Here is the ultimate light and sturdy stool (four legs are much better) to tuck into a pack, briefcase, or art kit.
It also functions as a footrest or table for the palette. My sketching friends are jealous and want one too. Best of all you get to choose the spot to paint from rather than having to sit on an existing bench or rock. Alternative use: a place to sit down in hot climates (India) , long lines (rush lines theater), intermenable tour guide talks (Machu Pichu) You can't imagine how much a seat helps.
I use this stool for motorcycle adventure riding. At 350g, it packs down pretty flat and small. It is stable, you can reach forward or to the side without worry of it flipping you over. It is easy to take out and set up for a lunch stop on the side of the road. I use it in combination with a small Japanese brand table. The height is perfect to get you off the ground, but still be low enough to set your beer down easily. It is the perfect middle man between a foam sit pad and a full on chair.
It is small, light and strong. Just the right height to sit in close to the campfire on a cold night. Convenient and easy to pull out while having a snack, or examining a map on the trail.