Purchased for a thru hike but didn’t end up bringing it, so it’s brand new. The Gossamer Gear Thinlight Foam Insulation Pad is the sleeping pad of your minimalist dreams. With 12 different uses - from adding insulation to your sleep system to its use as an on trail yoga mat, there is every reason for a thinlight pad to be an essential part of your ultralight backpacking kit. The average weight of the new Thinlight pad remains the same as previous versions. R-Value: We have not determined a R Value or temperature rating for the closed cell foam due to its variable density - but based on thermal conductivity data compiled by an independent scientist, we estimate the R values to be 0.5 for the 1/8" Thinlight. Please note that some pads will feature scuffs, small air pockets, or creases. This is cosmetic and does not affect performance. The folded pad perfectly replaces the sit pad in a size medium pack without any trimming. NOTE: sizes may vary by up to ½" length / 1.3 cm