Seaweed Tencel Running Shorts with Pocket – Black

Double-layer running shorts in a soothing SeaCell™ × TENCEL™ blend with Icelandic seaweed minerals active at the skin surface. Inner compression tight with a hidden pocket layered under loose, breezy outer shorts. One pull-on, two layers, nothing synthetic against your skin.

Mineral-rich fabric that soothes as you move. Supportive where you need it, relaxed where you don't.

Your skin is most absorbent when it's warm and open. Running in summer heat, that's every stride. What's pressing against your inner thighs matters.

Why This Blend Works

28% of this fabric is SeaCell™: a fiber made by embedding nutrient-rich Icelandic seaweed into the lyocell production process. The seaweed retains its natural minerals, including calcium, magnesium, and vitamin E, which are activated by your skin's natural moisture during wear.

The other 65% is Lenzing-certified TENCEL™ lyocell, made from sustainably harvested wood pulp in a closed-loop process. It adds silky smoothness, fast moisture transport, and structure to the knit. Together, these two fibers create something neither does alone: a fabric that's actively nourishing your skin while performing through your hardest sessions.

We add 7% ROICA V550 biodegradable elastane: enough for real compression in the inner tight and stretch recovery in the outer short. Double-layer construction demands more elastane than a single-layer legging, so we use ROICA V550, a certified biodegradable elastane that breaks down at end of life. The remaining 93% is plant-based fiber.

No polyester. No nylon. No synthetic performance coatings. No chemical finishes. Just fibers that work because of what they are.

Why You'll Love Them

✔ SeaCell™ minerals at the skin surface: calcium, magnesium, and vitamin E activated by natural skin moisture
✔ Permanently embedded, not a coating, not a treatment, doesn't wash out
✔ Double-layer construction: inner compression tight + loose outer short in one pull-on
✔ Hidden pocket in the inner tight: fits a phone, key, card, or gel without bouncing
✔ Loose outer short: relaxed leg opening with a softly curved hem for full range of motion
✔ Wide elastic waistband: sits at the natural waist, no dig, no slide
✔ Compression inner layer: anti-chafe support through the inner thigh
✔ Lenzing-certified TENCEL™ lyocell: silky smooth, fast-drying, sustainably produced
✔ ROICA V550 biodegradable elastane: certified to break down at end of life
✔ Natural temperature regulation: cool when it's hot, warm when it's not
✔ Odor-resistant: no chemical finish required
✔ OEKO-TEX Standard 100 certified: tested for 1,000+ harmful substances
✔ Biodegradable elastic waistband: organic cotton and natural rubber
✔ Organic cotton labels, cotton thread: every component considered
✔ No polyester, no nylon: 93% plant-based fibers

Perfect For: Running | Gym and strength training | Going out | Travel | Sensitive skin | Anyone who cares what their skin absorbs

Fit
Relaxed outer, compression inner. The outer short drapes loose around the thigh with a softly curved hem hitting mid-thigh on a 170cm / 5'7" model. The inner tight sits flush against the leg ending just above the outer hem: long enough to prevent chafing, short enough to stay invisible. Wide elastic waistband sits at the natural waist. Hidden pocket in the inner tight (right side) fits a phone, card or a key.

Composition
Outer short: 65% Lenzing-certified TENCEL™ lyocell, 28% SeaCell™, 7% ROICA V550 biodegradable elastane (220gsm)
Inner tight: 65% TENCEL™ lyocell, 28% SeaCell™, 7% ROICA V550 biodegradable elastane
Waistband elastic: 70% organic cotton, 30% natural rubber
Labels: 100% organic cotton
Thread: 100% lyocell