Selk'bag Lite 4G Ligthweight construction is 30% lower in weight than previoius versions of Selk'bag 45 degree performance perfect for two-season outdoor and two-season indoor use Compact carry sack allows for easy portability to and from the campsite, car or wherever you go Soft polyester shell with ripstop and water-resistant finish is both comfortable and durable New quick-release hand closure system allows for quick hand exit and entry without having to open and close zippers