The GOHUNT Down Booties are a purpose-built insulation piece for kicking around camp on cold days, or when you're sitting on a glassing knob and want to keep your feet extra warm. Designed to provide maximum heat retention while being packable and lightweight. These booties are designed to fit over your sock, and not over your boot. Made from 94% down cluster and 6% feather, the combination of baffle size, 900 fill power, 1.99 oz fill weight of down, and cluster percentage creates a massive amount of dead air space, ultimately providing greater heat retention. A cinch cord in the back to help lock in heat. The exterior fabric is a durable, tightly woven 20D nylon with a water-repellent finish to bead and discard light precipitation. The bottom under your foot is reinforced with a soft foam sole for added structure, with gel traction for grip. And the material is reinforced for added durability.