These bags are the best! Both of my horses (one is overweight/on a diet, and the other has PPID,) love them! I already had large hay play bags. But I purchased two of the button bags. I love the fact that they are closed on one side. So even when the weather is miserable and the ground bad, I can still use them without worrying about mud getting in. And that velcro means business! LOL. Great design. I can really stuff them to keep the boys busy. There are days when I use all 4 bags, the large play bags, and the button bags. So well made. Definitely my horses' favorite!