Full-sized chair sitting comfort in a 2.5 lb bundle: Carries easily over shoulder with adjustable shoulder strap, Opens instantly into a stool or comfy chair. Extra strong aluminum frame. Three-ply seat supports uniformly and sits like a bike-seat with seat post between your legs and with 19" of clearance between "back-support-straps" for hip clearance. (If you hips are larger than 21", this chair may not be your best fit). Multiple seat heights of 16", 19", 22"..... The 16" seat height fits any height person and ships anywhere in the world with low cost "First Class International Mail" (folds below 24" in length). The 19" seat height is best for use with full-sized tables like Roll-a-Table® and the 22" chair is too tall for most users and is only available via special order. Email firstname.lastname@example.org if you are interested in the 22" seat height Roll-a-Chair®.