This is Big Agnes Cyclone Chair which weighs only 170 grams. I always carry one of these. You can make a comfy chair with it out of just about any pad. Today I use the Thermarest Neoair X-Lite Womens or the Big Agnes Insulated AXL Air. In the past I used their Insulated Air Core. It works with all of these any many others besides I also use it to give structure to a frameless pack such as Gossamer Gear’s G4 or Gorilla (along with an Airbeam pad http://www.theultralighthiker.com/klymit-air-beam-inflatable-pack-frame-update/), It provides a dry seat which supports your (tired) back at the end of a long day and gets you 5-6” off the ground. I have spent many hours sitting on mine eg in front of a cheery fire in my Tyvek shelter: http://www.theultralighthiker.com/tyvek-solo-fire-shelter/
You should never sacrifice comfort for a few grams. A restful night’s sleep will make the miles go by that much easier next day.