Optimize your warm-up and recovery routines with the Hyperboot, a Nike x Hyperice collaboration. The wearable technology offers heat and Normatec dynamic air compression for feet and ankles that you can customize on the go. Advanced Heating and Massage - A system of dual-air Normatec bladders bonded to warming elements evenly distributes heat throughout the upper. It helps drive heat deep into the muscle and tissue in the feet and ankles. Relaxation on the Move - Designed for standing, walking, sitting or traveling, the battery-powered shoes work while your feet relax. Quick Adjustments - Buttons on the shoe or a Bluetooth connection to the Hyperice app let you choose from three levels of heat and Normatec dynamic air compression. Product Details - Nike return policy is 60 days. One year warranty is through Hyperice only. Heat temperatures - Level 1 = 111°F (44°C)/Level 2 = 118°F (48°C)/Level 3 = 125°F (52°C). Normatec compression levels - Level 1 = 50 mmHg/Level 2 = 130 mmHg/Level 3 = 210 mmHg. Battery life - 1-1.5 hours on max heat/compression. USB-C charger. TSA friendly. TSA friendly. FSA/HSA eligible. Spot clean. Imported.