Durable Nylon chassis w/ waterproof coating All seams sealed to ensure waterproof integrity Underarm venting zippers regulate jacket environment Internal elastic draw cords help seal jacket against the elements Collar with internal shock cord for sealing out the elements Bib interface connectors lock jacket and bib together Cargo pocket for storage of mission critical items Key pocket conveniently located on sleeve Fleece lined hand warmer pockets SIZING SIZE CHEST" SM 4-6 32-36 MD 6-8 34-38 LG 10-12 36-40 XL 11-16 38-42 2XL 18-20 40-44