Smartwool Men's Gray Merino 250 Base Layer Crew Top | Style #SW0NP600 Smartwool's 250 Long Sleeve Base Layer Crew is your first defense in fighting off the coldest mornings, because it is the warmest layer that Smartwool makes. It has a comfortable, tapered fit and is made with 100% Merino Wool that feels super soft and smooth, without the itch and bulk you'd get with traditional wool clothing. Smartwool's Merino 250 Gray Base Layer has flat seam construction that is chafe-free and it is designed to feel weightless under all the other layers of your clothing. Merino 250 Base Layer Gray Top Features:  Slim Fit Interlock knit provides ultimate comfort Crew neck with set-in sleeves Shoulder panels eliminate top shoulder seams Flatlock seam construction designed to eliminate chafing Knit in Vietnam: 100% Merino Wool Garment Weight: 255 g = 9 oz Care:  Machine Wash Warm Gentle Cycle. Do Not Bleach. Tumble Dry Low. Cool Iron As Needed. Dry Clean.    Smartwool Men's Gray Merino 250 Base Layer Long Sleeve Crew Top