“Preventing Cramps and Leg Spasms” - This is a supporter. I frequently get leg cramps in the morning. Leg cramps are very painful and difficult. I saw user reviews on an online shopping site saying it worked well, so I bought two sets of these products, including a spare for washing. I thought it would be okay since it's a free size, but perhaps because my calves are a little thick, it felt tight, and although I could put it on and take it off, I couldn't wear it for long. However, I think the product itself is good. It's a shame that my calves aren't a little thinner. One is completely unused, and I wore the other one for one night. Please refrain from purchasing if you are concerned about minor details. *The product for sale is in the fifth photo.