Does anyone know if there is such a beast as a "Siliva filter" for wont of a better term, that I can use when inflating a mattress. I have managed to delaminate the joins on 2 Exped UL SYN mat duo's. Each one lasts about 400 nights ( or three years - ish) prior to the internal seams parting. I have a friend who also uses an Exped UL, albeit a single, mattress and his has lasted about 6 years with approx the same usage as me. The only difference is, he uses a small USB air pump to pump his up. Based on this, I'm assuming it's the siliva in my breath that's causing the internal breakdown. I'm not keen on using a pump because; a) the noise, and b) I get a really good lung workout and I always notice the difference after a couple of weeks into a trip. I've tried a Google search, it just tells me to go back to bed!!!!
Thanks in advance.
Al.