The Alphaburly Aero with Solarcore is built to withstand the coldest temperatures delivering best-in-class thermal performance without the bulk or weight of traditional insulations. Integrated from midsole to upper it keeps you warm when conditions get serious and moving when the season demands it. Built on the same hand-laid premium rubber over a 5mm neoprene core for waterproof scent-free durability. The AeroForm ETPU midsole returns energy underfoot while the Burly Trak outsole keeps you planted no matter the terrain. Early season or late first light or last. Designed for hunting Very cold weather Waterproof Insulated 2000G Solarcore AeroForm ETPU midsole Rubber & neoprene Moisture wicking Grid Fleece lining