Description ***Rab classifies these pants as a Regular Fit, offering a balanced feel that&&';;s neither slim nor loose. The fit is comfortable and provides unrestricted movement. We suggest ordering them true to size.*** The Rab Electron Pro Pants are a lightweight, packable warmth for cold-weather glassing, camp, and other low-output moments when staying warm matters most. High-loft 800FP down provides efficient insulation without excessive bulk, while wind-resistant PertexA(R) Quantum Pro fabric adds durability and protection from light moisture and abrasion. Stitch-through baffles, an elastic waistband with removable belt, insulated fly, and elastic hems help balance mobility, comfort, and heat retention in demanding cold conditions. Specs Weight 13.47 oz (Size M) Insulation 800FP European goose down with Grangers fluorocarbon-free hydrophobic finish (5.4oz/153g, Size M) Main Fabric 20D PertexA(R) Quantum Pro with fluorocarbon-free DWR (36gsm) Manufacturer Warranty Limited lifetime Sizing Size Waist Inseam Small 30" 32" Medium 32" 32" Large 34" 32" X-Large 36" 32" XX-Large 38" 32" How to measure: Waist Find the top of your hip and measure the full circumference around your body Inseam Measure from your crotch to the base of your ankle.