Lightweight dual-density construction weighs one third as much as rubber, yet absorbs four times the force. Compression pads in the heel and forefoot of the outsole compress into the outsole to dissipate forces before they reach the feet and legs. Closed-cell polyurethane footbed construction retains its spring for an extended life cycle. Wolverine's exclusive dual-density polymer pads in the removable full cushion footbed absorb energy and shock.