3F UL Gear 3F UL GEAR Tyvek Sleeping Bag Cover Liner Waterproof Bivy Bag Camping Bags Ventilate Moisture-Proof Warming Every Dirty Inner Liner BIVY Sack (Type B)

It is frustrating to wet the condensate sleeping bag while hiking. People who have traveled long distances have probably experienced sleeping bags that become less hot due to moisture. I tried to solve this problem by covering the sleeping bag with a tyvek, because tyvek is waterproof and breathable, but since tyvek is so light and easy to move, it was inspired by the bottomless sleeping bag, the full foot closure can better protect the foot sleeping bag, it also has the positioning function, the top of the open design only needs to be covered on the sleeping bag, no sense of restraint, it is waterproof while It also also has a certain heating effect. However, due to the waterproofing property of the tyvek itself and the design structure of this product, it is not recommended to use it alone!