1. Thermal Retention Design: This outdoor bivouac bag is designed to retain up to 90% of your body heat, providing essential warmth in cold weather, camping adventures, and emergency situations. The innovative thermal technology creates an effective barrier against dropping temperatures and helps maintain your core body temperature when exposed to the elements. 2. Highquality weatherproof material: Made from highquality aluminized PE material, ing excellent tear resistance, waterproofing, and windproofing. This bivvy withstands harsh outdoor conditions, keeping you dry and protected during your adventure activities, regardless of weather challenges. 3. Highly visible features: The bright exterior color of this thermal sleeping bag serves as a natural signaling device in the wilderness, making you easily visible outdoors. This critical visibility provides added during outdoor excursions. 4. Compact and lightweight design: Weighing only 155 g and measuring 208 x 81 cm, this thermal bivouac bag folds down small for effortless carrying in your backpack. The spacesaving design makes it an ideal companion for backpacking, hiking, and camping trips, without adding significant weight to your gear.