when considering a sleeping bag temp, do you include wearing clothes in your decison or sleeping naked? I have always section hiked and camped in the summer. night time temps around 50 deg. i usually just sleep in a bag liner and if it gets cool i add a emer. bivy bag. both together are 16 oz.this year the average temp in the area iam hiking will be 35-40. Is a 20 deg bag the way to go or a 40 deg bag and just wear 100wt-200wt fleece to sleep in. ive sleep in mw capl in a 40 deg bag and been cold in damp 40 deg weather. generaly speaking i am a warm sleeper.