Montbell knows the secret to cold-weather comfort isn't always adding more layers. The Thermo-Up long sleeve t-shirt uses airy, long-pile fleece to deliver impressive warmth without the bulk, while releasing excess heat when you're on the move. Lightweight and breathable, it's always up for another adventure. 100% Polyester, CLIMAAIR LIGHT Fabric, Crewneck, Spiral Slant-Tec Cuff, Printed Branding, Style Code: 2306224-BK, - Montbell Men's Thermo-Up Long Sleeve T-Shirt Black Colour: black