Designed for smaller feet that get cold first on winter outings, these small-size heated socks pair dual 5000mAh lithium batteries with four heat levels from 40 to 70 deg C, delivering up to 7 hours of low-setting warmth on a single charge. The socks fit US 5 to 6 (EU 35 to 38) snugly inside ski boots, snowshoe boots, hiking boots, or indoor slippers, weighing just 0.88 lb. for the pair so they do not bulk up the boot fit. Heat wires wrap the toes, soles, and tops of the feet for even 360 deg. coverage, helping keep circulation steady during long stationary sits at a hockey rink, ice fishing hole, or chilly classroom. A companion app changes heat levels through a phone screen, while a physical button serves as a quick backup for gloved hands or kids who are not ready for app controls. The skin-friendly modal core yarn and faux mink fleece lining stay soft against the skin even after long wear, and the included laundry bag lets you machine or hand wash the socks between trips without damaging the heating elements. Color: Black/ gray and orange. Gender: Unisex.