There are 3 sizes available on listing, one is 18"x9", the second is 20"x7", and the third is 9"x4.5", please check and confirm the right size and fabric choice before check out.
Our made in the USA microwavable and freezable rice pad can be effortlessly used for pain relief virtually anywhere on your body. You can relieve bodily pain fast, safely, and conveniently with our heating pad without unwelcome side effects. Throw our cooling pad in the freezer for cold therapy if you have injuries, bruises, or swelling. 
Hot & Cold Compress: Microwave the heat pads for pain relief safely to obtain up to 20 min soothing moist heat therapy to reduce inflammation, stress, tension, and pain by promoting circulation. Cool the shoulder heating pads microwave in freezer to get a pleasant coldness to reduce swelling due to strains and sprains. This microwave heat pad heats up quickly and easily to provide soothing, comfortable relief to your entire body. 
Versatile and Flexible: Compared to other rice bags for heat therapy, this microwaveable heat pad is a fantastic multi-use heated wrap that is flexible to conform to your body, delivers soothing heat therapy to your eyes, head, neck, shoulders, back, arms, leg, ankle, and knee, etc. Great help with acute and chronic pain relief. Just heat the microwave heating pad for back pain relief in the microwave for 60 seconds.
The back and body pad (Style B) has 3 microwavable  or freezable packs (inserts) inside a 100% cotton washable cover for simple & easy cleaning.
There are 5 options (10-14) for organic cotton material, please check your selection prior to checkout, all other choices are non-organic cotton (1-9).