Self-heating waistcoat, neck guard, shoulder guard, waistcoat, back protection shirt, magnetic warm vest Feature: Product name: 68 magnets self-heating shoulder strap and neck guard Material: Mercerized cotton Product color: 68 magnets for strengthening support-black Product Size: M (suitable for waist circumference 53-83cm, recommended weight 45-60kg) L (suitable for waist circumference 60-97cm, recommended weight 60-72.5kg) XL (suitable for waist circumference 99-112cm, recommended weight 72.5-90kg) Product weight: M: 313g L: 335g XL: 350g Packing size: M:24*18*5cm, L:26*20*4cm, XL: 28*22*6cm Hot compress on the neck, self-heating, magnet curing, double the effect; Acupoint magnet, with 68 built-in energy magnets; djustable double elastic straps, balanced, stable wearing; Supported by 4 detachable plastic plates, effectively supporting and alleviating lumbar spine problems; Note: Just received the goods, there will be a slight smell of fabric, this is normal, put this product in a cool place for a period of to ventilate the smell can disperse: if it is directly to the, it is easy to wear it for more than 2 hours to avoid burns; Package Content: 1pc x type 68 magnets (M/L/XL) code +1 neck protector