This U-shaped neck-worn heater is powered by graphene heating technology, achieving 3-second rapid warming to wrap your neck in cozy heat instantly. Its inner liner is made of soft cashmere material, which is skin-friendly and gentle without irritation; it supports 4-level constant temperature adjustment (up to 55℃), allowing you to switch to the right warmth for different cold scenarios. With a lightweight U-shaped design that fits the neck curve, it's comfortable to wear without burden. Whether you're working, commuting or relaxing, you can enjoy the "warm neck, warm whole body" experience by carrying it around. It's a practical winter essential for keeping the cold at bay.