Features 1. **Arch Support Design**: Our insoles provide excellent arch support, helping to correct flat feet and improve overall foot posture for enhanced comfort and stability during daily activities. 2. **Thermoplastic Rubber Material**: Made from high-quality thermoplastic rubber, these insoles are durable, wear-resistant, and designed to withstand daily use while providing optimal support. 3. **Non-Slip Feature**: The non-slip surface ensures that the insoles stay securely in place within your shoes, allowing for confident movement without slipping or sliding. 4. **Versatile Use**: Ideal for individuals with flat feet or O-shaped legs, these insoles help alleviate discomfort and promote better alignment, making them perfect for everyday wear. 5. **Easy to Use**: Simply insert the insoles into your shoes, secure them behind the heel, and enjoy improved posture and comfort throughout your day. Our self-heating shoulder and neck heat packs contain thermoplastic rubber materials. It can help correct foot posture, gradually correct flat feet, O-shaped legs, leg rollover and other problems, making posture more normal. Its use is very simple: put the insole into the sole, fix it behind the heel, and then normal activity can be done. And can care for shoulder and neck.