Subset vs Pact Underwear: Is Subset Better Than Pact? (Honest Side-by-Side Review)

Last Updated on 1 minute ago by Kasey Lynch

If you’re switching to organic cotton underwear and trying to figure out whether Subset or Pact is worth your money, you’re in the right place.

I’ve personally tested both brands — multiple styles, multiple wash cycles, real wear testing — and this comparison breaks down exactly how they stack up side by side.

Short answer: Subset edges out Pact, and it’s not just about comfort. It comes down to material transparency, skin sensitivity, and overall fit consistency. If you’ve struggled with irritation from synthetic finishes or lace that lists zero ingredients, that context matters more than you might think.

Here’s everything you need to know.

Table of Contents

Brand Overview: Subset vs Pact at a Glance 

	Subset	Pact
Formerly known as	Knickey	Pact
Main fabric	95% organic cotton, 5% elastane	Organic cotton (blend varies by style)
Certification	GOTS certified	GOTS certified (not always listed per style)
Size range	XS–3XL	S–XL (limited)
Price per pair	~$20	~$12–$16
Style focus	Minimal everyday basics	Affordable sustainable basics
Lace options	No	Yes (material undisclosed)
Affiliate links	Shop Subset	Shop Pact

Both brands are positioning themselves as non-toxic, organic cotton alternatives to conventional underwear. On paper, they’re going after the same customer. In practice, they deliver pretty different experiences — especially if you have sensitive skin.

Material & Transparency Comparison

This is where things start to diverge, and it matters more than most people realize.

Subset

Subset lists full material breakdowns on every style:

• Main fabric: 95% organic cotton, 5% elastane
• Waistband: 91% nylon, 9% elastane
• Certification: GOTS certified organic cotton

You know exactly what’s touching your skin. There are no surprises.

Related: Honest Subset Underwear Review: Organic Cotton Thong, Briefs & Boyshorts

Pact

Pact checks the organic cotton box, but the level of disclosure varies — and in some styles, it’s missing altogether.

The most notable gap: the Lace Waist Thong lists no information about what the lace itself is made from. For a brand marketing itself as a non-toxic underwear option, that’s a significant omission. You’re wearing that lace against your hip for eight-plus hours, and you have no way to verify what it’s made of.

During my wear test of the Lace Waist Thong, I experienced mild itchiness along my right hip by end of day. I also personally experienced mild skin reactions to the chemical finishing on Pact’s PJ pants. Whether that’s a coincidence or connected to undisclosed materials, I can’t say for certain, but the pattern is worth naming.

Bottom line on transparency: Subset wins, and it’s not close. Knowing your full materials list isn’t a bonus feature — it’s the baseline for a brand that wants to be taken seriously in the non-toxic underwear space.

Related: Pact Underwear Review: Organic Cotton Underwear Tested (What They Don’t Tell You)

Fit & Sizing Comparison 

Subset Sizing

Subset runs true to size in my experience. If you’re between sizes and want a looser feel, size up. If you prefer snug, size down. Note that organic cotton will loosen slightly over time, especially with machine drying — so sizing down slightly for longevity is a smart move.

Size range: XS–3XL, which is generally inclusive.

Pact Sizing

Pact runs small. In my testing (across myself and an independent tester), a medium felt too snug and a large was only marginally better — but then felt slightly loose in some styles. That “between sizes” problem is frustrating, especially when you’re paying for organic materials and expecting some level of precision.

Size range: S–XL — more limited than Subset.

Bottom line on sizing: Subset is more reliable, more inclusive, and easier to shop for.

Side-by-Side: Thong Comparison 

This is the most direct comparison, since both brands offer organic cotton thongs. I wore both through full days, workouts, and multiple wash cycles.

	Subset Mid-Rise Thong	Pact Everyday Classic Fit Thong
Score	90/100	83/100
Price	~$20	~$12
Fabric	95% organic cotton, 5% elastane	95% Organic cotton, 5% elastane
Gusset score	20/25	20.5/25
Breathability score	18/20	18.5/20
Movement score	19/20	14.5/20
Fabric quality score	18/20	16/20
Waistband score	15/15	13/15
Wedgie effect?	No	Occasional
Stays put?	Yes — all day	Minor adjustments needed
Post-wash performance	Excellent — no shape change	Slight stretch variation
Panty line under leggings	Nearly invisible	Minimal
C-section scar note	N/A	Sits at scar line — heads up

The real difference

The Subset thong is, hands down, one of the most comfortable thong I’ve ever worn. It sits at a true mid-rise, the waistband doesn’t roll or dig, and — most critically — it stays put. No shifting, no adjusting, no wedgie effect by hour four.

The Pact thong is a reliable basic. It does the job. But the limited stretch, occasional wedgie effect, and slightly inconsistent sizing across body types keep it from reaching the same bar.

If you’re just dipping your toes into organic cotton thongs, Pact works as a lower-cost entry point. But if you want the one you’ll actually reach for without thinking, Subset is it.

Shop Subset Thong | Shop Pact Thong

Side-by-Side: Boy Short / Shortie Comparison 

	Subset Mid-Rise Boyshort Shorties	Pact Everyday Boy Short
Score	~4/5 (sleep-specific)	84/100
Inseam	~3 inches	Fuller cut
Waistband	Soft, flat, no roll	Soft, flexible — perfect score (15/15)
Leg openings	Self-edge, no elastic imprint	Inner thigh seam, slightly compressive
Best for	Sleep, lounge, flowy dresses	Lounging, slower days
Under leggings?	Not ideal — too much fabric	Not ideal for active wear
Breathability	Great for overnight	Good, but slightly warmer
Shape after washing	Maintains well with hang dry	Holds shape, recommend hang dry

The real difference

Both boyshort styles are comfort-first, not performance-first — and that’s fine if that’s what you need.

The Subset shorties have self-edge leg openings, meaning no elastic band leaving a mark at the end of the day. That’s a detail that makes a real difference if you’re wearing these to sleep or lounging all day. The Pact boy short has a slightly compressive inner thigh seam — not painful, but noticeable.

Pact actually scores its waistband at a perfect 15/15, which is impressive. But the inner seam compression keeps it from being fully effortless.

Both are great sleep options. If you run hot overnight, Subset’s airy construction wins. If you want maximum coverage with a secure waistband, Pact holds its own.

Shop Subset Boyshort Shorties | Shop Pact Boy Short

Side-by-Side: Bikini vs Brief Comparison 

These aren’t identical cuts, but they’re comparable in coverage and serve a similar purpose — a classic, everyday style that’s not a thong.

	Subset Low-Rise Brief	Pact Everyday Classic Fit Bikini
Score	3/5 (Kasey’s preference)	84/100
Coverage	Full coverage, mid-rise	Back: full and secure; Front: slightly lower rise
Seam lines	Visible under fitted clothing	Minimal movement — stays put well
Waistband	Slim, no rolling	14.5/15 — nearly perfect
Breathability	Slightly warmer by nature of coverage	Strong — consistent all day
C-section note	N/A	Seam hits at scar line — check this if relevant
Best for	Period days, laundry days	Everyday wear, those who prioritize breathability

The real difference

Honestly? The Pact bikini outperforms the Subset brief as a daily driver — at least for me. The Subset brief is great fabric in a cut I personally don’t gravitate toward, and you will see seam lines under fitted clothes.

The Pact bikini, on the other hand, stays put without constant readjusting and performs consistently for full-day wear. The slightly lower front rise is worth noting (especially for anyone post-c-section), but as a breathable everyday bikini, it’s one of Pact’s strongest styles.

This is the one category where Pact edges ahead — not because of the brand, but because of the specific cut.

Shop Subset Briefs | Shop Pact Bikini

Breathability & Odor

Both brands use organic cotton, and both deliver on breathability. This is one area where either brand will beat synthetic underwear — full stop.

Subset: After a full day plus a workout, end-of-day odor was mild. No dampness, no swampy feeling. The fabric works with your body rather than trapping heat against it.

Pact: Across all styles tested, airflow was strong and odor buildup was minimal. Nothing felt damp or heavy by end of day.

Call: For this category, it’s tough to call out substantial differences of Subset vs Pact, making it a tie. Both deliver what organic cotton promises. If this is your primary concern, either brand will serve you well.

Skin Sensitivity & Chemical Concerns 

This is the section I wish more sustainable underwear reviews talked about.

Organic cotton certification means the fiber was grown without synthetic pesticides. It does not automatically mean the finished garment is free of chemical dyes, finishing treatments, or synthetic trims.

My personal experience with Pact: I experienced skin reactions to the chemical finishing on Pact’s PJ pants. I also noticed mild hip itchiness on my right hip during wear testing of the Lace Waist Thong — the lace material of which is completely undisclosed. These may or may not be related, but they’re real experiences that inform how I evaluate the brand.

Subset: Zero irritation issues across all styles tested. No itchiness, no reactions. For someone who regularly deals with ingrown hairs, eczema, and skin sensitivity, that statement carries real weight. I’ve loved this brand for over a year and every time I try a different brand, I keep coming back to Subset.

If you have sensitive skin, this is not a small distinction. Subset’s full material disclosure and clean construction make it a much lower-risk choice. With Pact, you’re working with partial information — and for some people, that incomplete picture has real consequences.

Price Comparison 

	Subset	Pact
Per pair	~$20	~$12–$16
Bundles?	Yes — discounted multi-packs	Yes — multi-packs available
Value proposition	Pay more, get more clarity	Lower entry point, less consistency

Pact is the more accessible price point. That’s real, and worth acknowledging — especially if you’re stocking an entire drawer.

But here’s the honest math: if Pact doesn’t fit consistently, if you need to size up or down, if you’re replacing pairs that cause irritation, the savings evaporate quickly. Subset’s $20/pair is easier to justify when the first pair fits correctly and holds up after washing.

If budget is your primary constraint, Pact is a reasonable starting point. If you’re making a considered investment in your underwear drawer — and you have sensitive skin — Subset is worth the extra spend.

Sustainability & Certifications 

	Subset	Pact
Organic cotton	Yes	Yes
GOTS certified	Yes — clearly documented	Yes — but not always listed per style
Fair trade factories	Yes	Not prominently featured
Full material disclosure	Yes	Inconsistent (lace undisclosed)
Size inclusivity	XS–3XL	S–XL

Both brands are making genuine efforts. Neither is greenwashing in a cynical, bad-faith way. But Subset operates with more consistent transparency — and in the sustainable fashion space, transparency is the product.

GOTS certification is one of the most rigorous textile certifications available. Subset prominently documents it. Pact holds it too, but it doesn’t always surface in individual product descriptions, which creates unnecessary doubt.

Is Subset Better Than Pact? 

Yes — and here’s why that answer isn’t as simple as the scores.

Category	Winner
Comfort (overall)	Subset
Thong	Subset (90 vs 83)
Boy Short / Shortie	Subset
Bikini / Brief	Pact (bikini is excellent)
Breathability	Tie
Material transparency	Subset
Sizing consistency	Subset
Skin sensitivity	Subset
Price	Pact
Size range	Subset
Sustainability clarity	Subset

Subset wins most categories, but the transparency gap is what makes this comparison more than just a comfort contest.

When Pact doesn’t disclose what their lace is made of, and a reviewer experiences itchiness in that exact style, and that same reviewer has documented skin reactions to Pact’s chemical finishing in another product — that’s a pattern worth paying attention to. Not an accusation, but a real signal for anyone with sensitive skin.

As a brand who largely positions themselves as a non-toxic brand, it’s frustrating that Pact does not offer full material disclosures on each product. Conscious consumerism is highly dependent on transparency. When combining that observation with the fact that the lace waist thong caused my hip to be itchy for at least two weeks after the last wear — plus the mild itch factor from the waistband of their pajama pants as well — I’m left wondering exactly what we’re not being told.

Related: Pact Isn’t Eco-Friendly or Non-Toxic Anymore

Subset scores higher, fits more consistently, discloses more, and causes zero skin reactions. For most people — especially those making the switch from synthetics because of skin sensitivities — it’s the stronger choice.

Pact still earns a spot for people who want an affordable entry into organic cotton basics and don’t have sensitivity concerns. The bikini style in particular is a quiet overperformer. But it’s a starting point, not the final upgrade.

Who Should Buy Which Brand

Buy Subset if you:

• Have sensitive skin or a history of irritation from synthetic blends or chemical finishes
• Want full material transparency with every purchase
• Prioritize comfort and fit consistency over price
• Are building a long-term organic cotton wardrobe, not just testing the waters
• Want inclusive sizing (XS–3XL)
• Love a thong that actually stays put all day

Shop Subset →

Buy Pact if you:

• Are new to organic cotton underwear and want a lower-cost entry point
• Don’t have significant skin sensitivity concerns
• Prefer the bikini silhouette — Pact’s classic fit bikini is genuinely solid
• Want more style variety, including lace options
• Are comfortable sizing up to accommodate the slightly small fit

Shop Pact →

Frequently Asked Questions

Is Subset better than Pact overall? 

Yes, in most categories — particularly comfort, material transparency, sizing consistency, and skin sensitivity. Pact wins on price and has a strong bikini style. But for most people making a conscious switch to organic cotton underwear, Subset is the stronger investment.

Is Subset underwear worth the higher price? 

For most people, yes. At $20 per pair, you’re getting full material disclosure, GOTS-certified cotton, fair trade factories, and a fit that holds up after washing. If you’re replacing cheaper synthetic pairs that cause irritation, the math usually works out in Subset’s favor.

Does Pact underwear cause skin irritation? 

It depends on the person. I personally experienced a skin reaction to chemical finishing in Pact’s PJ pants, and mild itchiness in the Lace Waist Thong, which doesn’t disclose its lace material. If you have sensitive skin, the lack of full material disclosure is a real risk. Subset had zero irritation across all styles tested.

How does Subset sizing compare to Pact? 

Subset runs true to size; Pact runs small. Pact also has a narrower size range (S–XL vs Subset’s XS–3XL). If you’re between sizes with Pact, you’ll likely face a frustrating “neither size quite works” situation.

What’s the best organic cotton thong — Subset or Pact? 

Subset’s Mid-Rise Thong, with a score of 90/100, outperforms Pact’s Classic Fit Thong (83/100) in movement, fabric quality, waistband comfort, and all-day wearability. It’s the most comfortable thong I’ve personally worn.

Are both brands GOTS certified? 

Yes. Both Subset and Pact use GOTS-certified organic cotton. Subset documents this consistently; Pact’s certification isn’t always visible at the individual product level.

Can I wear Subset underwear to work out? 

The thong holds up well for moderate workouts. Neither brand is designed for high-impact athletic performance — if that’s your need, look at brands built specifically for athletic wear.

Which is better for sleeping — Subset or Pact boyshorts? 

Both work well for sleep, but Subset’s self-edge leg openings (no elastic band) give it an edge for overnight comfort. No imprint by morning.

---

Want to see where Subset and Pact rank against every other brand I’ve tested? Check out my full master scorecard →

Read the full reviews: Subset Underwear Review ~ Pact Underwear Review