Description Praised by Men's Journal and Backpacker Magazine, our Inversion Base Layer Top is made for cold weather. This 100% Merino wool long sleeve shirt feels amazing on your skin and keeps you warm without adding bulk to your layering kit. It's cut long so it stays tucked in. Discreet thumb holes keep your sleeves in place and disappear when not in use. Merino wool breathes well and doesn't hold odor, so you'll still smell fresh at après and can get multiple days of use before you need to wash it. Pair it with our Inversion bottoms in full length or 3/4 length. Product Features Natural, sustainable and biodegradable Merino wool All the benefits of Merino wool: resists odor, wicks moisture, breathes well and regulates temperature Designed for cold conditions Flatlock seams Backpack-friendly raglan construction Thumb loops to keep sleeves in place and disappear when not needed Printed neck label Removable care label Long cut that stays tucked in and is made for layering Size M weight: 11.8oz Fabric Details 100% Merino wool Warm 270 GSM fabric weight Super soft 18.5M Merino wool Care: Machine wash on warm or cold, hang dry. Do not bleach or dry clean. Iron on low wool setting. Learn more. Sizing/Fit Nate (in Rum Raisin) is 5'11" wearing a Large. Danila (in Black) is 5'10" wearing a Large. Joey (in Sierra Cement/Black) is 6'2" wearing a Large. Fitted Has extra length for more coverage Not sure what size to order? See our size guide.