Review (1/5): Worse than others I've tried, by far.
I needed a solution that worked so I ordered similar products as well as these. These were by far the worst: 1) they never expanded, even after a 24hrs; 2) they are too small; 3) the product pictured clearly shows a 3M adhesive backing (3M is a trustworthy company imho) which these don't actually have, so quite dishonest. Because they never expanded these are useless and untestable. The product I liked most was amzn.com/dp/B08HJH2TQM which was everything these weren't: 1) expanded in 20min and were soft, pliable, and very functional and comfortable; 2) are a reasonable size for an adult; 3) actually use a 3M adhesive (which has been reliable in use for this important task).