I've been using Convatec Sur-Fit Natura Moldable Durahesive skin barrier(411806) 2 piece and the wafer last me at least 10 days and could go longer without a problem but 10 days is the max for me. Although I make it a point to rinse the inside of the bag everytime I empty even when I am travelling. I just came back from Ohio and the hot weather there
did not affect my skin barrier whatsoever. I started using this barrier several months ago
after trying other bags from convatec, hollister, etc. because of allergic reaction to the adhesives. Never had a problem since then. I have a permanent ileostomy from a permanent colostomy due to colorectal cancer. Hope this info helps.