The Delta LT Zip is trim fitting & works superbly either as a lightweight all-year mid layer or as a super warm base layer for extreme conditions. Made with Polartec 100 micro grid fabric to get a high warmth to weight ratio & excellent wicking properties the Delta LT dries exceptionally quickly & hugs you body for super efficient performance. This comfortable pull is pretty much staff uniform at Trekitt as it has a great cut & fit as well as oozing Arcteryx quality & style. Moisture-wicking Breathable Insulated Great warmth-to-weight ratio Lightweight ultra quick-drying No-lift gusseted underarms High collar 1/2 front zip to improve venting