Extra Durable Bivvy Bag Material: The ultralight emergency sleeping bag is made of a mylar-like material with a tear and puncture resistant coating. They are durable enough for repeated use Multifunctional Use: It can be a survival emergency bag, poncho, emergency shelter and more, suitable for your out bag. Emergency sleeping bags perfect for emergency situations where warmth or protection from all weather conditions is required. Helps prevent hypothermia and shock by retaining/reflecting up to 90% of a user's body heat Waterproof and Windproof Function: This emergency sleeping bag is waterproof and windproof, made of extra thick tear and puncture resistant polyethylene material that keeps out rain, wind and snow. Designed to be your protection layer against harsh weather conditions Full Body Protection: It comes with 215x90cm emergency sleeping bag large size can support full body protection. Practical and convenient. Sealed seams and waterproof, windproof material keep you dry and warm Easy to carry and practical: Each blanket has its own bag. Lightweight, compact and portable. Designed for outdoor adventures to be ultralight and compact in size. This emergency bivvy is a small but potentially life-saving addition to your survival kit, car, home, bike bag, hiking backpack and camping gear