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SKIMS Stretch Boxer Brief

Common questions

Is SKIMS Stretch Boxer Brief healthy?

SKIMS Stretch Boxer Brief scores 60/100 on Scout's independent analysis of ingredients, additives, and lab results — a fair-to-good score — solid, with tradeoffs. SKIMS Stretch Boxer Brief scores 60/100.

How does SKIMS Stretch Boxer Brief compare to other underwear?

SKIMS Stretch Boxer Brief ranks #23 of 25 underwear in Scout's independent rankings. The current top score in the category is Organic Jaguar Organic Cotton Boxers at 100/100.

Which ingredients drive SKIMS Stretch Boxer Brief's score?

In Scout's ingredient-by-ingredient analysis, Elastane (9%), Undisclosed Dyes & Finishes are flagged as ingredients of concern. The full breakdown, with why each one matters, is in the Key ingredients section on this page.

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SKIMS Stretch Boxer Brief

60 Fair
View on Amazon

At a glance

Beneficial ingredients 0
Harmful ingredients 2
Category Underwear
Summary

SKIMS Stretch Boxer Brief scores 60/100. 91% modal and 9% elastane — a semi-synthetic cellulose blend with no organic certification. Modal avoids microplastic shedding but is chemically processed from beech wood pulp using carbon disulfide. 9% unspecified elastane with no BPA-free claim. No OEKO-TEX certification, no dye disclosure, no genital liner, unspecified import origin.

Key ingredients 3

Modal (91%)
Neutral

Semi-synthetic cellulose fiber derived from beech tree pulp. Does not shed microplastics like polyester, which is a meaningful advantage. However, production involves carbon disulfide (a neurotoxin) and SKIMS does not specify whether a closed-loop process is used. No organic or GOTS certification. Not a natural fiber — it is chemically reconstituted cellulose.

See more about Modal (91%) →
Elastane (9%)
Bad

Petroleum-derived polyurethane at 9% — nearly double what health-conscious brands like NADS use (5%). No BPA-free claim. A 2025 study found underwear elastane contained BPA, BPS, and BPF at concentrations up to 52,967 ng/g with high sweat migration rates. No genital liner to isolate the most absorptive skin from this synthetic.

See more about Elastane (9%) →
Undisclosed Dyes & Finishes
Bad

Multiple colorways with no OEKO-TEX certification or dye safety disclosure. 'Max stretch' fabric marketing suggests chemical finishing treatments that are not disclosed. No independent safety testing verified. Unspecified import origin.

See more about Undisclosed Dyes & Finishes →

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