Appreciate this is about trade offs. I have worked my way though a few mats & suffered valve failures, leaks & punctures. Now have a 2 week summer light weight bivvy trip planned with no mat resupply options. I am too old to sleep direct on the hard earth if a mat fails & can't be repaired. Thinking of going back to foam with some xtra strips stuck on in key pressure areas. I am a side sleeper. Any suggestions for a robust or perhaps easily repaired (on the hill) , lightweight, moderately comfortable mat. Doesn't need to be full length or width.