Very difficult to get cover over cast
Trying to get the Dry Pro medium full arm cover on my son's cast was very difficult - even though it was the right size according to measurements. Cramming his cast little by little into the cover took a very long time compared to the quick-n-easy video demonstration I'd watched online. The video demonstration was done on someone with a short cast that did not extend beyond the elbow like my son's. In addition I really scraped up my knuckles against the cast each time I wrestled the cover on him. I couldn't think of a way to avoid doing that since the cover is so snug and does not stretch easily. Once the cover was on, it did a good job keeping the cast dry - however it was such a hassle to get on him that I went to using a plastic garbage sack and a rubber band at the top instead. That worked well for taking a shower though I wouldn't trust it for swimming or a bath.