Smartwool Men's Merino 150 Baselayer Long Sleeve DescriptionSpring skiing or summer camping? The year-round Merino 150 Base Layer Long Sleeve is game for either. With our Core Spun technology, we've wrapped lightweight Merino around a nylon core for added durability, while still keeping the comfort of ultra-soft, responsibly-sourced Merino next to skin. We added smooth flatlock seams to help minimize chafing and offset shoulder and side seams to lie smoothly beneath pack straps. Select colorways feature a more responsible plant-based-dye technique. No matter the season or the activity, this base layer is made for it.BenefitsCore SpunMerino fibers wrapped around a nylon core for added durability while still keeping the comfort of Merino next to skinMerino 150This breathable, soft, lightweight fabric offers next-to-skin comfort, moves sweat away from the body, and acts as a versatile performance layer for warmer conditions.Features Slim Fit Our lightest weight Merino jersey fabric uses a nylon core to increase durability while still keeping 100% Merino wool next to skin Offset shoulder and side seams designed to increase comfort and minimize chafing while wearing a backpack Side seams wrap to front for body-enhancing fit Flatlock seam construction designed to minimize chafing Light Woodsmoke, Indigo Blue and Black Marble Wash colorways feature plant-based dye technique Knit in China: 87% Merino Wool, 13% Nylon. Exclusive Of Decoration CareMachine Wash Warm Gentle Cycle.Do Not BleachDo Not Dry CleanWash With Like Colors