Built to be mountain tough and snow sport friendly the 686 Frontier Insulated Boy's Bib are weatherproof 2-Layer infiDRY® 10K fabric with a 10K breathability rating filled with 120g of infiLoft™. A lightweight insulation made circular filament groupings that retain heat this has moisture resistance and a lofty feel for superior warmth that doesn’t trap moisture. Features he’ll love, from the thigh pockets to the bib pocket with audio outlet… plus side stretch panels for easy movement and a boot gaiter designed to fit over a variety of boots. This also has terrific customization, from the adjustable shoulder straps to belt loops at the waist, to the Youth Evolution™ Multiple Sizing System in the legs.. when growth happens, you’re covered. A great pair of pants with reinforcement at the cuffs and a grow system for longer wear and the 686 workwear aesthetic that you see in the adult sizing with a flexible fabric and comfortable build to keep kids out there for extra runs and extra fun.