MSR AC Bivy Sleeping Bag All-condition Bivy Protection with maximum breathability, weighing 0.42kg (15 oz) Zippered mesh panel allows for excellent bug-free ventilation Waterproof/breath-able top and (No Suggestions)-coated floor Top: 30D nylon Ripstop 2-ply breathable 1000mm Floor: 30D nylon (No Suggestions) coated 10,000 mm