● Size: 213 x 75cm when unfolded; 12 x 12 x 22cm when packed. The material uses aluminum foil processed with Tyvek on the surface. 【Features】 ● Uses tear-resistant fibers and is waterproof and windproof. ● Reflects and retains 70% of body heat. An ideal sleeping bag that releases moisture but doesn't release body heat. ※ Useful in all situations such as mountain climbing, backpacking, and emergencies.