“Snow Camping – More on Pads” reviews two four-season self-inflating sleeping pads:
1. The Thermarest Prolite 4 (1.5 lbs & 3.2 r-value)
2. Big Agnes’ Two Track 2″ Mummy (2.25 lbs & 6.5 r-value)
While the Big Agnes is rated as warmer and more comfortable inflatable pads, regardless of r-value, are vulnerable to pressure points like your hips and requiring a supplemental closed cell pad underneath.
