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Title: Can I rate it zero?
Review: Too thin, doesn't support at all. Good concept, though. But it's cheap foam and needs to be thicker. What is it made for kids under 130 pounds or what? It hurts my back, doesn't help it. The vinyl part makes me sweat, (bad material to sit on for long hours). I use a thick kitchen cushion with gripping on the other side, and get better results. If they made it thicker, with BETTER foam like memory foam or something and used better material, then I'd probably try it. But this is just cheap "wedge" foam, doesn't work well for me.
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