Lo from Keilhauer

Designed using Keilhauer’s knowledge of healthy sitting postures, Lo is a charming elevated floor cushion that allows the casual meeting to stay casual. Slitting with the hips higher than the knees restores gravitational equilibrium and natural spinal curves. The cushion can be upholstered in any Keilhauer textiles or leather. The wire base is available in any Keilhauer standard powder coat colors, or in polished chrome.

http://www.keilhauer.com/products/lounge/lo_/49314_49310/14100.html