FLEX 7/10 CONSTRUCTION CONSTRUCTION Conform Grip 2.0 Toe Strap: Overmolded elastic strap for maximum hold and slip-free grip UnderWrap.2 Heel Hoop: Bombproof stability with four points of connection. Madison Highback: Responsive and smooth flexing. Contour Boss Ankle Strap: Soft and supportive. Full Highback Rotation with Channel adjust Tool-Free highback forward lean adjuster AutoStraps