Warmth where it matters, mobility when it matters: The North Face Tansa Hybrid ThermoBall Gilet is an ideal layer for the mountain. Enjoy dual protection as you climb higher: ThermoBall insulation at the core locks in warmth, while WindWall fabric completely blocks out chilly wind. Without sleeves, you'll be free to grab and hold your way to the top. With zipped pockets, a stowable hood and an included stuff sack, this gilet is not only protective, but practical too. There's a reason we named it after the Japanese phonetic for 'exploration'.