Fangrui Product Details 1. Features: 2. **long-lasting Warmth**: Each Disposable Hand Warmer Provides Up To 10 Hours Of Soothing Heat, For Keeping Your Hands Warm During Cold Winter Days. 3. **easy To Use**: Simply Open The Package, Stick The Patch Inside Your Clothing, And Enjoy Heat In Just 15-30 Minutes Without Any Shaking Or Kneading Required. 4. **safe And Effective**: Made With Vermiculite And Activated Carbon, Our Hand Warmers Ensure A Steady Release Of Heat Without Burning Or Excessive Oxygen Exposure. 5. **portable And Convenient**: This 10-pack Of Hand Warmers Is Lightweight And Easy To Carry, Making It Ideal For Outdoor Activities, Sports Events, Or Daily Commutes In Winter. 6. **skin-friendly Design**: The Patches Are Designed For Natural Heat Application, Providing Comfort Without Irritation, Making Them Suitable For All Skin Types. 7. Our Disposable Hand Warmers Contain Vermiculite And Activated Carbon. It Can Keep Us Warm In The Cold Winter. It Won't Let The Oxygen Penetrate Too Fast, Lose Heat And Burn. Its Use Method Is Very Simple: 1. After Opening The Package, Take Out The Patch And Stick It On The Inside Of The Clothes. 2. The Patch Will Start To Heat Up In 15-30 Minutes. 3. The Insulation Effect Can Last For 10 Hours. And Can Be Applied To The Skin Naturally Long-lasting Heat, No Need To Shake Or Knead Warm Hands/antifreeze.