LONG-LASTING COOLING TUBE: Stay cool during hot summer days with innovative materials designed to provide extended cooling relief. This cooling gel chills quickly and maintains its coolness longer than water-based alternatives. NO BATTERY REQUIRED: No battery or charger needed. Simply place the neck cooling tube in iced water to activate. No ice available? No problemit can be cooled using any cold air source, including car AC, office AC, home AC, ice box, refrigerator, or freezer. SAFE AND EFFECTIVE: Provides cooling comfort for up to 46 hours indoors and 35 hours outdoors. Cooling duration may vary based on external conditions. Designed to deliver a safe cooling experience without risk of skin irritation, frostbite, or overcooling by maintaining an optimal temperature. DRY AND COOL: Features a new coolant formula that prevents condensation, keeping the surface dry while delivering a refreshing chill. PHYSICAL COOLING: Uses physical cooling technology for a safer, chemical-free experience. Made with non-toxic fabric thats gentle on the skin and comfortable to wear around the neck.