Big Agnes 3 Wire Hooped Bivy Waterproof bulkier things like sleeping bags Headband folds into the bulkier things like sleeping bags and jackets and a large front panel U zip into the main compartment means you have easy access to all your gear at once without dumping it on the trail ripstop fabric floor provides ultra durability and the 3 layer fabric with electrospun nanofiber technology provides high rates of waterproofing and breathability to help manage moisture and keep your interior microclimate totally comfortable The extra long side zipper allows for easy entry exit with a full mesh layer underneath for venting in good weather