FEATURES of the Arcteryx Men's Delta LT Zip Polartec Classic 100 micro velour small grid has high warmth-to-weight ratio High collar provides warmth and layers easily 1/2 front zip with chin guard provides rapid ventilation and works well with other layers, harnesses and packs No-lift gusseted underarms, drop back hem SPECIFICATIONS of the Arcteryx Men's Delta LT Zip Weight: 9.5 oz / 270 g Trim fit Polartec Classic 100 micro velour small grid-100% polyester ARC'TERYX TRIM FIT: These trim fitting pieces share motion-friendly traits with the Arc'teryx Athletic Fit, but are patterned with lower volume for reduced bulk. Arc'teryx trim fit styles are sized for a base layer and a trim synthetic or down filled mid-layer. Check out the size guide to learn how to calculate your body measurements before selecting a size. This product can only be shipped within the United States. Please don't hate us.