✅ Choose the warm tourmaline self-heating heating fabric, which is skin-friendly and breathable to achieve high-quality, warm waist protection. ✅ Exquisite workmanship, firm and firm lines, not easy to fall off, more sensitive; self-heating, magnet curing, lumbar support. ✅ Comfortable and soft material that not wicks away sweat, but also keeps you warm. ✅ Four steel plates at the waist provide gentle support for fragile, injured and arthritic backs. There are 9 magnets in the abdomen and 16 magnets in the waist, acupuncture points are magnetically stimulated to promote blood circulation and keep the abdomen area warm in the waist area. ✅ Suitable for all kinds of sports protection, ideal for winter and cold autumn outdoor activities. Size: L, XL, XXL, please measure the waist length according to the position of the navel, and choose the appropriate size to buy.