getting a pad into a survival kit would be quite a trick,in a BOB which is sort of a camping kit,not so hard.for my camping trips i use a 2 inch thermarest and it's much better than blue foam or even a 1 inch thermarest.thats one bit of gear i don't cheat on even if it's a bit heavy.i sleep well but do wake up at least once a night to turn over.anyone who have been in the Army will tell you that along with a hot meal that sleep,and just not rest,will recharge your battery for whats next.not having a pad in my ditch kit i would go all out to make some sort of a soft spot to sleep.