I bought a set of the 5lbs per ankle ankle weights. About a week after using them, the velcro strap on the back came off. Its only sewn on.
Also, I didn't receive any instruction booklet, directions on proper use, or any short of a picture with a guy wearing wrist weights. I couldn't tell which end was the front until I saw a picture of someone using them on the box, even then, it was hard to figure out.
apparently, there's a certain way that it has to be tightened. If its too loose, they slide down and the velcro strap and weight bars start to cut into your foot and ankle. If its too tight, it cuts off circulation. If its just right, the velcro strap starts to bust its seems which makes it too loose, and then it cuts into your ankle bone.
I'm sure that there would need to be a warning or something about using them too, as they could break or damage your ankle if worn incorrectly. and it probably isn't hard for many people to do that since there's no instructions.
other than what I said above, this product is ok