For one, this product is not the size it's listed as. I bought it for the large 12 x 24 size, but it is only 11 x 20 (the box even says it). Does not come with a strap, either, as stated. Also, it is VERY stiff! If you want it say for the back of your neck, it is very uncomfortable because it won't "wrap" around your neck. The cover is also very cheap polyester. Not worth it at all!