MATERIALS

All about materials and sportswear, from cotton to polyester, merino, Tencel. Pros and cons, comparisons, and everything in between.

Black organic cotton sportswear set worn in a studio. LAINE HILL
Materials

What to wear for what: best fabrics by sport

Yoga, pilates, strength, walking, running, cycling, hot yoga, swimming. The right fabric for each...

May 11, 2026
W
Materials

What GOTS, OEKO-TEX and Fair Wear actually mean (and what they don't)

Three of the most cited textile certifications, side by side. What each one audits, what each one...

May 11, 2026
Knit structure detail on black organic cotton legging. LAINE HILL
Materials

Why two leggings with the same composition feel completely different

92% cotton, 8% spandex on the label does not tell you everything. Yarn quality, knit structure, f...

May 11, 2026
Black organic cotton sportswear set, neutral background. LAINE HILL
Materials

Cotton vs polyester for fitness, head to head

Eight criteria, scored honestly. What cotton wins, what polyester wins, and what that means for w...

May 11, 2026
Black organic cotton sportswear set, neutral background. LAINE HILL
Materials

Is recycled polyester actually sustainable?

rPET, ocean plastic, recycled bottles. We unpack the four claims behind recycled polyester active...

May 11, 2026
Folded black organic cotton activewear, neutral background. LAINE HILL
Materials

Why polyester smells faster

Sweat does not smell. Bacteria do. Here is why synthetic activewear hosts the bacteria that cause...

May 11, 2026
Black organic cotton legging waistband detail. LAINE HILL
Materials

Why your sportswear makes you itch

Red patches under your sports bra strap, itching after a workout, irritation that won't fade. Her...

May 11, 2026
Natural fabric activewear in daylight. LAINE HILL
Materials

Best natural fabrics for activewear, compared honestly

Cotton, merino, tencel, bamboo, hemp, modal, linen — what every natural fabric actually does on t...

May 11, 2026
We are not perfect
Materials

We are not perfect

We do not call ourselves sustainable. Here is what we actually do, what we deliberately do not cl...

May 11, 2026
Black organic cotton sportswear set on a neutral background. LAINE HILL
Materials

For half a century we got it wrong

For 50 years we wore polyester to sweat in. Here is what synthetics do during a workout, and why ...

May 10, 2026