They may not be heavy, but they're surely not "lightweights" when it comes to protection and durability. Kenetrek uses the same reinforced heel/toe protection and strength weaved into the heavy duty boot socks, for your summer to early fall hunts. They're odor resistant and insulate when wet. Even better, with every purchase a portion of the proceeds will be donated to RMEF to continue their vital work. Made in USA. Features36% Merino Wool, 35% Polypropylene, 20% Nylon, 6% Elastic, 3% LycraReinforced heel/toeHeavy duty strength