The last week of school before the summer holidays my 6 year old son broke his arm, we were also entering a heat wave. I quickly researched waterproof cast covers and Bloccs seemed to be the top choice. I ordered off Amazon and the next day it was at our door. (Canada!) I was hesitant at first but after a good swim around the pool I checked my sons arm and it was completely dry! We have used the cover daily, and multiple times a day I might add since we received it!! Thank you so much for this amazing product! I have been telling everyone about it while at our weekly orthopaedic appointments.