Minus33 Micro Weight - Men's Wool Sleeveless Tank Top WoolverinoAt the peak of your workout, Mother Nature may try to stop you. Don't let her! When the heat sets in, stay cool with our Woolverino Micro Sleeveless. The range of movement you expect from a sleeveless combined with the extreme moisture wicking power of Merino Wool will keep you going even when the elements try to stand in your way. Fabric Fiber Content: 84% Merino Wool, 12% Nylon, 4% Spandex OEKO TEX STANDARD 100 Certified Woolmark Certified