The Alpha 4.0 jacket is full of details that work on your favourite slopes. The jacket includes Helly Hansen's Life Pocket which uses your body heat and the jacket's insulation to keep your phone warm. The manufacturer describes the jacket's vents as "strategic", which is a pretty bold term when literally talking about jacket ventilation, but they are, in fact, exactly where they need to be. - Waterproof, windproof and breathable Helly Tech Professional material, sealed seams - The outer fabric has a bit of stretch - Top-quality insulation (PrimaLoft Black Ocean), made of recycled polyester - RECCO avalanche reflector - Elastic snow skirt at the waist - Detachable hood, compatible with a ski helmet - Stretchy inner cuffs prevent wind and snow from entering - Lift ticket pocket - Life pocket for your phone, with Primaloft Aerogel insulation - Bluesign approved The surface fabric contains 85% polyamide and 15% elastane for stretch. Liner fabric 1 contains 86% recycled polyester and 15