Helly Hansen Warm Freeze Long Sleeve Half Zip Baselayer features the HH Warm system. HH Warm is a two-layer system. Lifa Stay Dry innovation attracts sweat away from the body, so that it vaporizes right into the air from the textile surface to supply optimal comfort whilst you work out.
LIFA Stay dry technology
Chest 1/2 zip
Dry next to skin, warm, non itch and alergy neutral
Features 2-in-1 first and second layer