Product details: Brand: ROCKBROS Name: Heated cycling shoe covers Material: 90% polyester +10% elastane Size: S/M/L Colour: Black Applicable objects: Unisex Adults Heating mode: Soft, foldable composite fibre heating body Power supply: 5000mAh mobile phone battery/3.7V Net weight: shoe cover ≈340g±5/pair, battery ≈108g/piece 【Warm heated with 3 temperature levels】- Padded with heating element and equipped with 3 temperature levels, Low(blue): 40℃, lasting 8h;Medium(white): 50℃, lasting 6h;High(red): 60℃ for 4h. Our heated cycling shoe covers help to concentrate the heat on the instep and toes to prevent your feet from getting cold in a short time, and provide an adjustable temperature to suit your heating needs. 【USB rechargeable with 5000mAh battery】- ROCKBROS winter shoes cover come with 2 charging cables for portable charging the 2 battery packs. Keep standby for up to 8 hours after fully charged. It can quickly reach a maximum temperature of 60℃ in just 30 seconds. Try these cycling shoe covers, never worry about your toes getting frozen in extra cold weather. 【Excellent Windproof Performance】- Windproof overshoes to make sure you are warm and protected from punishing winds. Keep your feet dry and warm in wet, cold weather, large areas of Kevlar base design for heels and toes parts are more wear resistance. In addition, we do not recommend machine wash or hand wash, just need a wet towel you can quickly clean the winter shoes cover. 【Reflective LOGO & Water Resistant】- Reflective side logo and details of the winter shoes cover add extra visibility in low light conditions and make you safer riding at night. You can ride with confidence knowing that you will not only keep warm but also look fantastic in the process! 【High Elasticity Fabric & Durable zipper】- Made of high quality PP non-woven fabric and thermal fleece inside for excellent warmer windproof performance, increasing your comfort in cold weather with our heated boot covers. The innovative design features a highly elastic fabric and a durable zip fastener that ensures a comfortable fit on different shoe sizes and comfortable wear.