I am so glad I got this phone holder right before our vacation to the Mighty 5 National Parks in Utah! Since we will be doing lots of hiking, this will be a great way to keep my phone (camera) handy without the need for a backpack or purse. It should hold a phone, keys and an emergcy rain poncho with enough room left to squeeze in a granola bar. I have a water bladder as well, so this will minimize what I have to carry. It is reflective, which will be great for biking in the parks! The size is adjustable, but should fit just about any adult or older children. Just what I needed for keeping my stuff safe and close. #rankboostrreview #sponsered #ares