Full 360° Toe & Full Foot Targeted Heating System - Built-in composite fiber heating wires deliver all-around warmth on toes, sole and instep. Powered by stable 7.4V/4W heating output, lab tested to rise 45–50℃ above ambient temperature even under -20℃. No cold spots during all-day snow sports or winter commutes.
Smart S Square LED Control with Auto Anti-Scald Protection - Upgraded S-shaped square power display switch shows real-time remaining power, plus 5-minute auto heat shift function. Built-in intelligent cooling mechanism automatically drops temperature over 55℃ to prevent overheating and scalding feet, safe for long-time wearing.
Stretch Breathable 4-Size Unisex Fit for All Foot Shapes - Blended fabric: 55% Polyester, 25% Elastic, 15% Spandex, 5% Nylon. Outer brushed milk silk + inner 4-way stretch lining wick sweat and stay non-stuffy. Four combined sizes S/M/L/XL fit foot sizes 35–48 US, snug without sliding down inside ski boots.
User-Friendly Battery Pocket & Complete US Charging Kit - External elastic knitted battery pouch on calf secures batteries tight during movement. Packed with US standard 5V USB adapter + 8.4V 1.2A one-to-two boost cable; full charge finishes within 4–4.5 hours. Pass FCC, CE, UKCA, ROHS global safety certifications.
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