★★★★★ 600+ reviews

Train in wool, Not plastic

The Active Merino Liner Short. A 100% organic cotton shell over an ultra-fine merino wool liner. Zero polyester. Zero plastic. The gym short you'd wear with Loro Piana.

100% Natural Fibre New Zealand Merino Small Batches of 500
Train in wool, Not plastic
The Problem

Your shorts are made from plastic bottles.

Shiny, sweaty, synthetic. 92% of activewear is polyester, petroleum that's cheap to make and prints margins. You were sold plastic and told it was performance.

Sweat soaks into synthetic fibre and sits there. The smell, the rash, a trash bag against the most absorbent skin on your body.

Every wear, your synthetic shorts shed microplastics. Those particles are now turning up where they were never meant to be, in human blood, in lungs, in testicles. You don't just wear plastic. You absorb it.

A peer-reviewed study linked polyester to reduced fertility and testicular shrinkage. The industry knows, natural fibre just costs them more.

Once you've felt natural fibre against your skin, you don't go back.

Your shorts are made from plastic bottles.
From source to skin

Two shorts. Two origins.

One begins in a mountain pasture. The other in a refinery. See where what you wear actually comes from.

The pasture
Step 01

The pasture

Merino grown on RWS-certified New Zealand farms.

The fleece
Step 02

The fleece

Ultra-fine 17.5-micron wool, shorn from the flock.

The fibre
Step 03

The fibre

Spun and knitted with a 100% organic cotton shell.

Your short
Step 04

Your short

Finished in small batches. Worn against your skin.

Four honest steps. A fibre that was alive, kept close to what it was.

Why Nero

Built for performance. Made from nature.

Built for performance. Made from nature.
Merino Liner

Temperature regulating.

Merino reads your body, not the forecast, cool when you run hot, warm when it drops.

Organic Cotton Shell

Soft. Breathable. Real.

A 100% organic cotton shell over the liner. No plastic against your skin.

No Odour

Wear it. Wear it again.

Merino resists odour-causing bacteria, so a pair goes further between washes.

The full rundown

An athletic cut, not baggy, not loud. A discreet zip pocket, a natural rubber-and-cotton waistband that stretches without plastic, and stitching built for years, not seasons.

Wool absorbs moisture into the core of the fibre and releases it as vapor. You stay dry through the workout, the walk, the flight, without the damp synthetic cling.

Merino reads your body, not the forecast. It releases heat when you run hot and holds it when the air drops, so there's no plastic clinging to your thighs mid-session.

Merino resists the bacteria that cause smell, so a pair goes further between washes. Built for the gym, the carry-on, and the days that run long.

The Nero guarantee
99days

Feel the difference, or send them back.

Wear them. Train in them. Sweat in them. If you can go back to plastic after that, we'll refund you in full - no questions asked.

Try them risk-free
The Choice Is Simple

Stop training in plastic.

We eliminated polyester entirely. A 100% organic cotton shell, an ultra-fine 17.5-micron merino wool liner. The same calibre of fibre Europe's luxury houses trust, re-engineered for the way you actually move.

Shop the Active Short →
★★★★★ 4.8/5 (600+ Reviews)
Over 30,000+ Shorts Sold
Only 500 made. When this run sells out, the next one is weeks away.
Stop training in plastic.