Foam. 11" seat width. Pleated stitch style upholstery. The Kickflip features a fast and aggressive profile and stance. Other than that, built with LePera’s Marathon Foam on a steel base plate a for maximum stability and comfort. The high arching back support will provide a secure in-bike feel for extreme riding, combined with excellent back support on long stretches. Handcrafted with an iconic attention to detail, complete with an aggressive profile and stance. Perfect!