The familiar 2-piece Combimate system combines simplicity with security. It comes down to snapping it on, like a Tupperware cover on a box. It takes very little finger power. Even with a weak belly the attachment is an easy procedure. Combimate wafers are available in different sizes, plain and convex. The pouches are available in many sizes and models as well. Pouches and wafers are compatible with ConvaTec Natura and Hollister Tandem system.