The SUR-FIT Natura Flange System signals a secure and accurate closure with a series of audible 'clicks.' A simple snap-off, snap on design allows the user to change the pouch very quickly to match activities without removing the skin barrier from the skin. Durahesive skin barriers are specially designed for people whose stoma output is mostly liquid. Unlike many other skin barriers that can break down around liquid output, Durahesive skin barriers swell up to protect the stoma. This special feature which is called turtle-necking, helps create a more secure seal without actually harming the skin. Durahesive skin barriers are also easy to fit, apply, & remove. They'll adhere securely to the skin while showering, bathing and swimming.