1/8" EVA foam sleeping pads. Made to protect your inflatable pad and boost it's R value or to use as a standalone ultralight sleeping pad in warmer months.
 
The 20X40" torso pads can be used to replace the sit pad on the back panel in all of our backpacks. This will work in both the frameless and framed packs and is a great way to store your pad in addition to reducing your pack weight.
 
1/8" Pad Specs:
20X40" torso pad weight 1.4-1.6oz
20X80" full length pad weight 2.8-3.3oz
R-Value is roughly .5