American Express

The trail. The city. The flight. The heat. One pant handles all of it.

The Cool Shield is engineered for everywhere the day takes you. Anti-mosquito fabric technology woven directly into the material — no sprays, no patches, no second thoughts. Instant cool-feel construction that keeps you comfortable when the temperature climbs. Quick-dry and lightweight so you barely feel them on. Two silhouettes, eight colorways, and a fit that works whether you're navigating a trail or a city block.

What Makes It Different

Anti-Mosquito Fabric Technology — Built-in protection woven into the fabric itself. No sprays needed. No second thoughts.
Instant Cool-Feel Material — Cooling sensation against the skin from the moment you put them on. Built for heat.
Quick-Dry & Lightweight — Barely feel them on. Dries fast after sweat or rain. Ready for whatever comes next.
Loose Relaxed Fit — Unrestricted movement for outdoor activities, travel, or casual city wear.
Two Silhouettes — Straight Cut for a classic relaxed look. Ankle Strap for a more tailored, active feel.
8 Colorways — Black, Dark Gray, Light Gray, Misty Blue, Apricot, Purple, Green, Pink.
Sizes S–3XL — Check our size guide for the best fit.

Product Specs

Material: Anti-mosquito, cool-feel, quick-dry fabric
Fit: Loose, relaxed
Silhouettes: Straight Cut / Ankle Strap
Colors: Black, Dark Gray, Light Gray, Misty Blue, Apricot, Purple, Green, Pink
Sizes: S, M, L, XL, XXL, 3XL
Best for: Hiking, travel, outdoor work, hot city days
Care: Machine wash cold, hang dry. Do not bleach or tumble dry.

Sizing Note: These trousers run to an international slim standard — size up one for your ideal relaxed Western fit.

How to Wear It

Pair with a moisture-wicking tee and trail shoes for a full outdoor look. Go city with a linen shirt and clean sneakers for a sharp warm-weather vibe. Layer under a lightweight jacket when the evening cools. The Cool Shield works every environment on your itinerary.

Built for the Undefyned Man

At Undefyning Lynes, performance gear doesn't have to look like performance gear. The Cool Shield is part of The Undefyned Man collection — for the man who moves through the world prepared, protected, and always sharp.