I have various light therapy products I cla pad by Dpl flex - which I love. I purchased this product for its larger length for usage as a belt over my upper, lower, or mid back. I love the size of this. I’m not a fan of the clear plastic cover over the lights. I suspect it’s there to keep the light pad clean and free from sweat - however I expect over time this type of plastic will degrade and possibly become brittle and cracked. I can’t say for sure but that’s just what i think of this type of plastic. I hope I’m wrong about this.