I run a lot and recently bought this case to use with my iPhone. It is stiff as mentioned in other reviews, but I don't really use the controls much after I start running, so this isn't a problem. I ran an eight mile race last weekend and sweated quite a bit. Pulled my phone out after the run and didn't have any issues. The fit is tight, so you will have to take your phone out of any case you may currently have it in prior to using this product.