Yes I absolutely love this icepack it has a strap that goes around your waist and one for your leg ,i dont even use the leg strap and it stays in place well and it helps with hip bursitis alot so thank ful i found it
Yes, it fits very well. I have gained the post-menopausal "Covid 20" wine weight around my middle, and this fits around my expanded waist with room to spare.
It's all plastic, as far as I can tell, but in either case it's not good to put it directly on your skin without a layer of cloth beneath.
I do not believe it will strap to cover to the butt, but if you were to be laying down and just have it placed across the area it may work for that. I don't use the straps as I use it for the back of my left leg when sitting or laying down.