Description ***These pants feature the patented Contour Waist(TM) system with up to 3" of adjustment and are sized to accommodate layering. If you wear a large in Stone Glacier base layers, you will also wear a large in their other layers. Reference the Size Chart below if you are unsure*** The Stone Glacier Grumman Down Pant delivers exceptional warmth in a lightweight, highly packable design for hunters facing cold backcountry conditions. Insulated with 850+ fill power HyperDRY(TM) goose down and protected by a wind-resistant 15D PertexA(R) Quantum shell, it offers an outstanding warmth-to-weight ratio without adding unnecessary bulk. Full-length side zippers open completely from the waist to the cuff, allowing for quick layering over boots and outerwear when temperatures drop. Updated with a quieter micro-ripstop face fabric and a slimmer waist for improved comfort under a pack belt, the Grumman also stuffs into its integrated storage pocket for easy packing between glassing sessions and long hikes. Specs Weight 13.6 oz (Size Large) Material 15 Denier Pertex Quantum Shell Insulation Type 850+ fill power goose down Fill Weight 4.2 oz Manufacturer Warranty Lifetime warranty on materials and workmanship Sizing Size Waist Beltline Inseam S 29" 29-31" 31" S/M 31" 31-32.5" 31" S/MT 31" 31-32.5" 36.5" M 32" 32.5-34" 32" MT 32" 32.5-34" 36.5" M/L 34" 34-36" 33" M/LT 34" 34-36" 36.5" L 36" 36-38" 33" LT 36" 36-38" 36.5" L/XL 37" 38-39.5" 36.5" L/XLT 37" 38-39.5" 36.5" XL 38" 39.5-41" 33" XLT 38" 39.5-41" 36.5" XXL 40" 41-43" 33" How to measure: Waist Measure around your waist at the point where you normally wear your pants or belt Inseam While standing, measure from your crotch down the inside of your leg to the floor