The NEMO Chipper is a closed-cell foam camp seat, 42 x 32 cm and 160 g, with an R-value of 2 for ground insulation. It's not a full-length sleeping pad - it's a small sit-pad for breaks on the trail or sitting at camp, keeping cold and damp from the ground off you without carrying a full pad's weight or bulk.
It's made from reclaimed foam offcuts rather than virgin foam, using material that would otherwise be scrap from manufacturing other foam products. At 160 g it's light enough to clip to a pack or stash in a side pocket for quick access at rest stops. It suits hikers who want a dedicated seat separate from their sleeping pad, rather than anyone looking for ground insulation to actually sleep on.