Customizable Temperature Control The vest offers three temperature settings - High (up to 3.5 hours at 50°C/122°F), Medium (up to 6 hours at 45°C/113°F), and Low (up to 10 hours at 38°C/100°F) - allowing you to tailor the heat output to your personal preference and adapt to changing weather conditions. This flexibility ensures that you remain comfortable. Note: Heat time can vary depending on the heat level selected, ambient temperature, and the battery charge level. iWarm Heating System KastKing's Calido Heated Vest uses cutting-edge carbon nanotube membrane tech for uniform warmth. With CE, RoHS, and FCC certifications, it's safe and efficient, preventing localized heating. The vest also features graphene thermal fabric, quickly disperses heat evenly and enhancing heat retention for maximum comfort. Safety is key: Overheating Protection and Short-Circuit Protection included. Extended Heating Time Equipped with a high-capacity 10,000mAh FCC certified power bank, KastKing's heated vest provides extended heating time. This robust power source ensures you have ample warmth for long outings or extended outdoor activities, reducing the need for frequent recharging. Practical Design KastKing's heated vest is easy to care for, machine and hand washable. It offers ample storage with three pockets, features reflective elements for safety, and includes a storm flap and zipper garage for added comfort and protection. KastKing's heated vest is a versatile choice, making it an excellent gift for family and friends, perfect for cold-weather activities. Customizable Temperature Control The vest offers three temperature settings - High (up to 3.5 hours at 50°C/122°F), Medium (up to 6 hours at 45°C/113°F), and Low (up to 10 hours at 38°C/100°F) - allowing you to tailor the heat output to your personal preference and adapt to changing weather conditions. This flexibility ensures that you remain comfortable. Note: Heat time can vary depending on the heat level selected, ambient temperature, and the battery charge level. iWarm Heating System KastKing's Calido Heated Vest uses cutting-edge carbon nanotube membrane tech for uniform warmth. With CE, RoHS, and FCC certifications, it's safe and efficient, preventing localized heating. The vest also features graphene thermal fabric, quickly disperses heat evenly and enhancing heat retention for maximum comfort. Safety is key: Overheating Protection and Short-Circuit Protection included. Extended Heating Time Equipped with a high-capacity 10,000mAh FCC certified power bank, KastKing's heated vest provides extended heating time. This robust power source ensures you have ample warmth for long outings or extended outdoor activities, reducing the need for frequent recharging. Practical Design KastKing's heated vest is easy to care for, machine and hand washable. It offers ample storage with three pockets, features reflective elements for safety, and includes a storm flap and zipper garage for added comfort and protection. KastKing's heated vest is a versatile choice, making it an excellent gift for family and friends, perfect for cold-weather activities.