Best merino wool T-shirt brands
Updated November 7, 2026
A merino T-shirt can be worn several days without smelling, which makes it popular for travel and hiking.
Look for 150 to 170 GSM for warm-weather tees and 18.5 microns or finer, and note any nylon core or blend.
The 20 brands below sell merino wool T-shirts and are listed in The Plain Thread directory. The green links go straight to their matching shop pages. Some of these brands also sell blends, so check the fiber content on each product.
Merino wool outdoor apparel for men and women with a Himalayan-inspired aesthetic.
100% New Zealand merino wool base layers and travel clothing for men and women.
New Zealand ZQ merino wool ski and outdoor apparel for men and women.
Sydney-made custom-fit organic cotton, hemp, and merino clothing for men and women.
Merino wool base layers and cotton outdoor clothing built for hiking, climbing, and running.
Danish organic cotton basics in a wide range of bold colors for men and women.
UK surf and outdoor brand making apparel in organic cotton, hemp, and merino.
New Zealand merino wool outdoor base layers and apparel for men, women, and kids.
PFAS-free women's ski and outdoor apparel using natural fibers.
Swiss sustainable clothing brand making casual tops, basics, and everyday wear from organic cotton, with a tree planted for every item sold.
Alpine outdoor merino wool apparel for men and women.
Full-range organic brand offering clothing and underwear in organic cotton, linen, hemp, and merino.
Merino wool outdoor and travel apparel for men and women.
Men's activewear and underwear in organic cotton and merino wool.
Spanish casual basics in hemp, organic cotton, and merino for men and women.
Merino wool travel clothing for men and women designed to be worn for weeks between washes.
American-made men's wardrobe staples in Supima cotton, linen, hemp, and merino.
Women's premium apparel in organic linen, Pima cotton, and merino with a take-back program.
Canadian casual and basics brand in organic cotton for men and women.
Common questions
Is merino hot in summer?
Lightweight merino handles sweat well, and many people wear it all summer.
Why do merino tees get holes?
Thin merino is delicate. Nylon-core yarns last longer, while pure merino needs gentler care.
How many days can I wear a merino tee?
Several, if you air it out overnight. Wash it when it starts to smell.