If I could only buy one packer ever, this would be The One. It works at the gym or the pool because its compact design means I never have to worry about anything slipping out of place. The size means it will never make a bulge that's awkwardly large. And the solid, one-piece design makes it sturdy and easy to clean. It's a winner. If what you're looking for is presentation under clothing, this is the one you could use anywhere, anytime, in any situation, and it just works.