I sustained a broken metacarpal and had to wear a cast for 6 weeks, I swim once a week and shower every day, I was dreading not being able to do either of them for six weeks, when I got home from hospital, in with my leaflets for aftercare information there was a leaflet on Bloccs waterproof protection. I must admit I was skeptical but thought it would be worth it if it worked. Being able to shower was good enough, but still being able to swim was even better. I would total recommend this to anyone who needs to protect there cast and carry on with enjoying the things they enjoy. 5 star rating.