The original technical Helly Hansen long sleeve base layer. HH LIFA: Is an ultra-light weight base layer fabric that works perfectly in the autumn and winter. HH LIFA delivers light insulation and moisture management through its 100% single layer LIFA fibers. The LIFA technology works best when layered under another garment, as the more garments you wear, the further the sweat and moisture will be transported out of the fabric and away from your skin. Features: lightweight insulation, 100% lifa, flatlock seams for max comfort, natural stretch fabric Good for: ocean & offshore sailing, coastal sailing, inshore sailing, dinghy sailing, camping & hiking, climbing & mountaineering, trekking, off piste, side Country, freeride, resort, on piste, alpine, backcountry, ski touring, mountaineering, FIT: Fitted - Slim fit to body. Fitted technical garments may be worn over baselayers and light midlayers. Pants are slimmer through the thigh and knee and won't go much below the ankle when standing up straight.