The bivvy bag is a practical device for all those who like to spend time in the nature. A bivvy bag is basically a waterproof bag that serves to protect your sleeping bag from rain, dew and moisture. It also protects the sleeping bag and your belongings from inclement weather and animals. Bivy bags are made of different materials such as Gore-Tex, silnylon or PU waterproof material. These materials ensure high waterproofness. Some bivvy bags also have a mosquito net for protection against insects. A bivvy bag is a great accessory for hikers, climbers and nature lovers who need to rely on their gear even in the harshest conditions. In addition to protection against rain and moisture, it will also provide you with additional insulation and protection from the wind.