Discover the ultimate in performance with the REI Co-op Men’s Merino Wool 185 Thermal Base Layer Top. Made from 100% ultrafine merino wool, this base layer offers natural breathability, moisture-wicking, and odor resistance—ideal for extended outdoor adventures.
- Ultrafine 185 g merino wool ensures a soft feel without itchiness.
- UPF 30 sun protection shields you during long days outside.
- Flat seams and merrow stitch construction prevent irritation and chafing.
- Underarm gussets provide unrestricted movement for active pursuits.
- Designed to fit snugly to maximize thermal efficiency.
- Lightweight and quick-drying, perfect for hiking, skiing, or camping.
Whether you’re layering up for chilly mornings or wearing it solo, this thermal top excels as the best merino wool base layer for men seeking comfort, performance, and durability. Plus, it’s made in a Fair Trade Certified™ factory with a commitment to sustainability.
Gregory Flores (verified owner) –
I bought this men’s thermal long sleeve top online for my hiking trips, and it’s been a game changer. It stays fresh after long days and fits perfectly under my jacket.
Mrs. Linda Moore PhD (verified owner) –
This breathable long sleeve shirt is incredibly soft and comfortable. I love that it doesn’t hold odor even after sweating hard on the trail.
Pamela Phillips (verified owner) –
Great find during the men’s outdoor apparel sale! The merino wool base layer keeps me warm without overheating and dries quickly.