Features: 
Brand new and high quality 
Self-heating pad designed for the shoulder 
Can effectively improve blood circulation, promote metabolism, and clear the meridians, enhance immunity 
Applicable to bone hyperplasia, shoulder pain, joint pain and other symptoms of hyperthermia therapy 
Easy to use, discreet and can be used anywhere any time 
Safe & comfortable to wear 
1-2 hours per day is recommended


Trumpet (S): 36cm, Medium (M): 39cm, Large (L): 42cm, Extra-large (XL): 45cm
This fabric is elastic type, the above dimensions are not stretched open shoulder width!