Battery life varies by temperature setting. At maximum heat, expect several hours of warmth. The 3000mAh capacity provides significantly longer runtime than standard 2000mAh alternatives, with quick recharging capability.

Yes, FireFootie insoles feature waterproof construction that handles brief water exposure like rain or puddles. For cleaning, gently rinse and avoid prolonged soaking to maintain optimal performance and longevity.

Control temperature through the smartphone APP for precise adjustment or use the built-in button. Press and hold two seconds to power on, short press to cycle through three temperature levels ranging from 104°F to 140°F.

The ultra-thin 0.19-inch design fits most footwear including boots, sneakers, and work shoes. The cuttable feature lets you trim insoles along marked lines to match your exact shoe size for perfect fit.

At just 0.19 inches thick with soft foam material, these insoles add minimal bulk. The breathable, curved design conforms naturally to your feet, fitting comfortably inside most shoes without cramping or discomfort.

Absolutely. The APP control allows independent temperature adjustment for left and right feet. This personalized feature accommodates different circulation levels or preferences, ensuring balanced comfort for both feet simultaneously.

Trim along the outer cutting line based on your measured shoe length and our size chart. Match your EU or US size to the corresponding insole length, allowing for slight 0.2-0.3cm deviation for optimal fit.

APP control provides real-time temperature monitoring, timer settings, and device personalization through your smartphone. Button control offers simple on-off and temperature cycling without requiring phone connectivity, giving you flexible operation options.