The strap is flexible enough to accommodate my Note4 with cover. It works well protected and the fact that it is a little uncomfortable to wear stirred more by the sheer size of the smartphone. The bracelet itself is comfortable and looks very well made. The Velcro closes very safe, so that made me not crept concern that it could be solved. Only the smell is after a few missions and many hours airing still there, what, a bit naturally makes thoughtfully with a product that is potentially worn on sweaty skin.