The REI Co-op MerinoTrail 185 Men’s Long Sleeve Base Layer blends ultrafine merino wool with advanced design to deliver unmatched comfort on multi-day outdoor adventures. This merino wool base layer naturally breathes, wicks moisture, and dries quickly—perfect for hiking, camping, and other outdoor sports.
- Crafted from 100% ultrafine 185 g merino wool for a soft, itch-free feel
- UPF 30 sun protection shields you during long days on the trail
- Flat seams and merrow stitch construction reduce chafing during intense movement
- Underarm gussets improve range of motion for climbing, running, or cycling
- Designed to fit snugly for optimal layering beneath jackets or alone
Durability meets sustainability in this Fair Trade Certified™ piece, built to perform on everything from brisk morning hikes to nights around the campfire. It’s quick drying athletic wear that keeps pace with your active lifestyle.
Machine washable with gentle cycle and wool-specific detergent; avoid twisting or wringing to maintain the fabric’s integrity. Tumble dry low or air dry for best results.
James Phillips (verified owner) –
I’ve tried many base layers, but the MerinoTrail 185 stands out. It’s the best men’s long sleeve shirt for hiking I’ve owned—soft, breathable, and it dries fast after sweaty climbs.
Courtney Daniels (verified owner) –
This is affordable outdoor performance clothing for men that truly delivers. The merino wool base layer resists odors even on multi-day trips, making it perfect for camping.
Brandy Small (verified owner) –
As someone who values sustainable activewear, I appreciate how this shirt combines eco-conscious materials with high performance. It’s quick drying athletic wear that doesn’t compromise on comfort.