Features: Innovative identity heating materials provide continuous warmth lacking external power, ideal for outdoor tasks and daily commutes in cold weather. Specifically developed for lumbar assist, it proposals strong stability and reduces pressure, excellent for sitting otherwise heavy physical work. Direct current polyamide ensures excellent breathability ease, suitable everyone day wear in various tasks like work otherwise amusement. Features a flexible hook and cycle plan for individualized fit, easily modifiable to different waist measurements for strengthened convenience. Thin plan creates it simple carry, suitable effortlessly into a backpack for travel, fitness, otherwise daily use. Specifications: Fabric: Polyamide, with good flexibility and wear resistance, ensuring the comfort and durability of the waistband. Processecond: Adopt identity heating technology to provide effective lumbar assist through a fixed assist plan, while promoting blood distribution and alleviating lumbar fatigue. Size:M Length:90cm(35.43inch) Waist-line:65-80cm Size:L Length:100cm(39.37inch) Waist-line:80-95cm Size:XL Length:110cm(43.31inch) Waist-line:85-105cm Size:XXL Length:120cm(47.24inch) Waist-line:100-125cm Package Includes: Belt × 1 note: 1.Please allow 0-1cm error due to manual measurement. Be sure you donot mind before bid. 2.Due to difference between different monitors, the picture may not reflect the actual color