The Bogs 4-H men's boot is part of the Bogs outdoor education give-back program. For every pair sold, Bogs will donate $5 to 4-H programs that support outdoor education. This boot is 100% waterproof and is made with 7mm Neo-Tech waterproof insulation. It is comfort rated from temperate to -40°F. The durable, hand-lasted rubber is applied over a four-way stretch inner bootie to give great comfort and protection.