Bogs Men's Turf Stomper-M 100% Natural Rubber, Neoprene Imported Rubber sole REBOUND: Our proprietary cushioning technology, Rebound performs, well in cold conditions doesnt compact down like other cushioning materials (eg. EVA, PU, gel, etc.) LIGHTWEIGHT: Developed with our seamless construction process, the Bozeman is 30% lighter than comparable insulated boots. DURAFRESH: Our odor reduction technology, DuraFresh, is a 100% natural organic biotechnology. It fights odors over the life of the boot. ENHANCED DURABILITY: Built with seamless technology, the Bozeman has been tested to 1400 miles in cold conditions.