QUALITY LIGHTWEIGHT BASELAYER: Woolverino designed for "First-On-Last-Off" extreme comfort quality active wear. The best in easy care technology means your merino wool is machine washable and dryable. Minus33 briefs naturally wick moisture CRAFTED TO FIT: Sizes S to 2XL Regular Fit. Outfitting anyone from the active athlete to the comfortable couch-potato. EXPERIENCED BRAND: Although there are many copy-cats on the market today, Minus33 has been a trusted brand since 2004. IMPORTED: As the legacy of a 100+ year old USA based woolen company, Minus33 knows quality and comfort in Merino Wool. We are committed to bringing you the best Merino Wool products at a reasonable price. TECHNICAL DETAILS: 84% 17.5 Micron Merino Wool, 12% Nylon, 4% Spandex 150 g/m2 Jersey knit construction with flatlock seam. UPF Rating 27