Gdigital Emergency Survival Mylar Thermal Sleeping Bag Compact Waterproof Blankets NASA GRADE MYLAR - our blankets are made of 100% Nasa derived mylar. EXTRA LARGE BLANKETS - Our blankets are 7ft x 4.2ft to give you coverage for any situation Retains back 90% of body heat. - Reusable, waterproof and windproof. INDIVIDUALLY WRAPPED - Each blankets is neatly and conveniently wrapped individually so you can keep any number of them anywhere for ultimate preparedness Money Back Guarantee: refund money for any quality problem.