Kids

Socks & underwear

Cotton-primary socks and underwear without unnecessary antimicrobial or stain-resistant treatments.

These clothes sit directly against skin throughout the day.  We favor cotton and identify the elastane, nylon or other fibers used for stretch and durability.  A cotton-rich blend can be practical, but it is not described as entirely natural when the label includes synthetic fibers.

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Engel Organic Merino Wool & Silk Long-Sleeve Undershirt — Olive Engel Organic Merino Wool & Silk Long-Sleeve Undershirt — Olive WOOLSILK Why we recommend it: This fine-rib undershirt combines organic merino wool with silk for a warm, lightweight layer instead of polyester thermals.  Made in Germany, it works under everyday clothes without much bulk.  Check the height-based sizing: the fit is slim.  Hand-wash and dry flat; wool may still irritate sensitive skin. Materials: 70% organic merino wool · 30% silk · sewing thread and label fibers not specified $65.99★ 5.0 · 3 ratings View on Amazon
Lucky & Me Nolan Organic Cotton Boxer Briefs — Arctic, 7-Pack Lucky & Me Nolan Organic Cotton Boxer Briefs — Arctic, 7-Pack ORGANIC COTTON Why we recommend it: Organic cotton is the main fabric against the skin in these longer-leg boxer briefs, a breathable alternative to polyester underwear.  The tag-free design and flat seams keep bulky labels and stitching to a minimum.  The waistband contains elastic, whose fiber content is not specified.  Made in Sri Lanka; allow for the maker's stated 7–10% wash shrinkage when choosing a size. Materials: organic cotton · elastic (fiber not specified) $42.00★ 4.8 · 600+ ratings View on Amazon
Fruit of the Loom Boys' Cotton Ribbed Undershirt Tanks — 7 Pack Fruit of the Loom Boys' Cotton Ribbed Undershirt Tanks — 7 Pack OEKO-TEX STANDARD 100COTTON Why we recommend it: Made with 100% cotton ribbed fabric, these tanks add a breathable layer under school shirts.  The tag-free, sleeveless design is useful for children who dislike scratchy neck labels.  OEKO-TEX STANDARD 100 certification adds a check for regulated and other harmful substances; choose the size carefully, because the cut is slim and long. Materials: 100% cotton ribbed fabric $14.92★ 4.7 · 13,000+ ratings View on Amazon
Lucky & Me Erica Organic Cotton Bikini Underwear — Macaron, 6-Pack Lucky & Me Erica Organic Cotton Bikini Underwear — Macaron, 6-Pack ORGANIC COTTON Why we recommend it: A light pointelle knit gives this lower-rise underwear its stretch and airy feel, with organic cotton as the main skin-contact fabric.  Cotton fabric covers the elastic at the waist and leg openings, and there is no sewn-in label at the back.  Made in Sri Lanka.  The elastic's fiber content is not specified; follow the size guide, which allows for 7–10% shrinkage. Materials: organic cotton · elastic (fiber not specified) $38.00★ 4.5 · 200+ ratings View on Amazon
HOCOSA Organic Merino Wool Long-Sleeve Undershirt — Blue HOCOSA Organic Merino Wool Long-Sleeve Undershirt — Blue WOOL Why we recommend it: A lightweight wool layer for chilly days, with organic merino rather than polyester as the main fabric.  The thin knit fits under everyday clothes without the bulk of fleece.  Owners often find it runs small, and wool can feel itchy on sensitive skin, so check the measurements and wash gently.  Sewing-thread and label fibers are not publicly specified. Materials: 100% organic merino wool main fabric · sewing-thread and label fibers not publicly specified $49.90★ 4.3 · 69 ratings View on Amazon
Hocosa Organic Wool & Silk Sleeveless Undershirt — Natural White, 14 Years Hocosa Organic Wool & Silk Sleeveless Undershirt — Natural White, 14 Years WOOLSILK Why we recommend it: A light merino-wool-and-silk layer for colder days, without a polyester base fabric.  The sleeveless cut fits under everyday clothes without bulky sleeves.  Made in Switzerland.  Choose by height rather than age alone: owners report a snug fit and shrinkage, so gentle hand washing and flat drying are important. Materials: 70% organic merino wool · 30% silk $44.90★ 4.3 · 55 ratings View on Amazon
City Threads Boys' Organic Cotton Briefs — Charcoal City Threads Boys' Organic Cotton Briefs — Charcoal ORGANIC COTTON Why we recommend it: Cotton rib covers the body and waistband of these simple briefs, avoiding the wide exposed synthetic band found on many children's underwear.  The maker specifies organic cotton yarn and cotton sewing thread, with a separate polyester label.  Made in Los Angeles, the briefs offer a soft, washable everyday option without a synthetic-blend body fabric. Materials: 100% organic cotton rib fabric · cotton thread · fabric-covered elastic waistband · polyester label $11.75 View product
City Threads Girls' Organic Cotton Briefs — Teal City Threads Girls' Organic Cotton Briefs — Teal ORGANIC COTTON Why we recommend it: Fabric-covered elastic at both the waist and leg openings keeps the edges soft against the skin.  These briefs use organic cotton rib for the body instead of a stretch-synthetic blend, with cotton thread and a separately listed polyester label.  The low-profile pull-on design is made in Los Angeles and can be cold-washed and tumble-dried low. Materials: 100% organic cotton rib fabric · cotton thread · fabric-covered waist and leg elastic · polyester label $11.75 View product
City Threads Organic Cotton Athletic Boxer Briefs — Navy City Threads Organic Cotton Athletic Boxer Briefs — Navy ORGANIC COTTON Why we recommend it: The longer, closer-fitting legs provide more coverage under play clothes while keeping the main fabric organic cotton rather than polyester or nylon.  A fabric-covered waistband avoids a broad exposed elastic band.  Made in Los Angeles, these suit children who prefer boxer-brief coverage and a soft rib knit that can be cold-washed after an active day. Materials: 100% organic cotton rib fabric · cotton thread · covered elastic waistband · polyester label $15.99 View product
City Threads Organic Cotton Boxer Briefs, 3-Pack — White City Threads Organic Cotton Boxer Briefs, 3-Pack — White ORGANIC COTTON Why we recommend it: The standard boxer cut offers soft cotton coverage without the longer athletic leg.  Organic cotton rib and cotton sewing thread make up the main construction, while fabric covers the elastic waistband.  This three-pack is made in Los Angeles and is easy to rotate through everyday washing.  It is a cotton-fabric choice, with a polyester label and elastic still present. Materials: 100% organic cotton rib fabric · cotton thread · covered elastic waistband · polyester label $35.95 View product
Cosilana Cotton, Merino Wool & Silk Sleeveless Undershirt — Pale Blue, 3–4 Years Cosilana Cotton, Merino Wool & Silk Sleeveless Undershirt — Pale Blue, 3–4 Years ORGANIC COTTONWOOLSILK Why we recommend it: Organic cotton, merino wool and silk make a light ribbed layer under school shirts.  Seamless sides and a sleeveless cut keep bulk down.  Check the height-based sizing and wash gently; the neckline and armholes can stretch with wear.  UK retailer; price is in GBP before delivery and import charges. Materials: 45% organic cotton · 35% organic merino wool · 20% silk · sewing-thread and label fibers unspecified GBP 12.80 View product
Cosilana Merino Wool & Silk Long-Sleeve Undershirt — Red Stripes, 3–4 Years Cosilana Merino Wool & Silk Long-Sleeve Undershirt — Red Stripes, 3–4 Years WOOLSILK Why we recommend it: Organic merino wool and silk give this fine-knit undershirt warmth without a bulky fleece layer.  Choose by height and hand-wash gently: owners report a close fit and occasional shrinkage, and wool can feel itchy.  Sewing-thread and label fibers are unspecified.  UK retailer; price is in GBP before delivery and import charges. Materials: 70% organic merino wool · 30% silk · sewing-thread and label fibers unspecified GBP 19.90 View product
Cosilana Merino Wool & Silk Turtleneck Undershirt — Navy, 3–4 Years Cosilana Merino Wool & Silk Turtleneck Undershirt — Navy, 3–4 Years WOOLSILK Why we recommend it: The fine merino-and-silk knit adds a warm layer under winter clothes, with a fold-over neck for extra coverage.  Owners describe repeated wear and passing it down, though the snug neck can make dressing harder.  Hand-wash gently.  Sewing-thread and label fibers are unspecified.  UK retailer; GBP price excludes delivery and import charges. Materials: 70% organic merino wool · 30% silk · sewing-thread and label fibers unspecified GBP 21.30 View product
Cosilana Organic Merino Wool & Silk Short-Sleeve Undershirt — Plum, 7–8 Years Cosilana Organic Merino Wool & Silk Short-Sleeve Undershirt — Plum, 7–8 Years WOOLSILK Why we recommend it: This fine-knit merino-and-silk undershirt is a lightweight alternative to polyester base layers.  Its close fit works well under everyday clothes, though wool can still feel itchy on sensitive skin.  Check the size chart and wash gently; sewing-thread and label fibers are not specified by the manufacturer. Materials: 70% organic merino wool · 30% silk · sewing-thread and label fibers unspecified $28.95 View product
Cottonique Organic Cotton Boys' Rib Briefs — 3 Pack, Natural Cottonique Organic Cotton Boys' Rib Briefs — 3 Pack, Natural ORGANIC COTTON Why we recommend it: Ribbed organic cotton and a double-layer front give these briefs a soft, flexible fit, with reversed seams to reduce rubbing.  Made in the Philippines and identified by Cottonique as GOTS-certified.  The waist and leg bands contain synthetic elastic fully covered by cotton; they are latex- and spandex-free, but the briefs are not entirely plastic-free. Materials: organic cotton rib fabric · cotton thread · cotton-covered synthetic elastic $25.00 View product
Cottonique Organic Cotton Girls' Briefs — 3 Pack, Natural Cottonique Organic Cotton Girls' Briefs — 3 Pack, Natural ORGANIC COTTON Why we recommend it: A double cotton crotch liner and covered seams keep this everyday brief focused on soft fabric against skin.  Its organic-cotton jersey is undyed in Natural, and the manufacturer identifies the Philippine-made garment as GOTS-certified.  Cotton-covered synthetic elastic supplies the stretch at the waist and legs, so the whole brief should not be mistaken for an all-cotton construction. Materials: organic cotton jersey · double cotton crotch liner · cotton-covered synthetic elastic $25.00 View product
Cottonique Organic Cotton Kids' Crew Socks — 3 Pairs, Natural Cottonique Organic Cotton Kids' Crew Socks — 3 Pairs, Natural COTTON Why we recommend it: These crew socks get their stretch from ribbed cotton knitting rather than added elastic, making the fiber content unusually straightforward.  Smooth toe seams and elastic-free cuffs are useful details for children who dislike tight or scratchy socks.  Made in the Philippines from organic combed cotton and identified by the maker as GOTS-certified; check the foot-length size chart and dry flat. Materials: 100% organic combed cotton $18.00 View product
Engel Merino Wool & Silk Short-Sleeve Undershirt — Saffron, 3–4 Years Engel Merino Wool & Silk Short-Sleeve Undershirt — Saffron, 3–4 Years WOOLSILK Why we recommend it: Short sleeves make this fine-rib merino-and-silk top easy to layer under school clothes without bunching at the arms.  Owners describe years of use, but the cut is snug and wool can still feel itchy.  Hand-wash and dry flat.  Sewing-thread and label fibers are not publicly specified. Materials: 70% organic merino wool · 30% silk · sewing-thread and label fibers unspecified $47.99 View product

What we avoid

These are category-level exclusions when materials or treatments are disclosed.  Each product card explains why we recommend it and lists the disclosed materials.

Parabens Phthalates Synthetic fragrance Sulfates (SLS/SLES) Formaldehyde releasers