Upper features a breathable knitted upper with a roomier vamp. MORPHIT construction in the mid-foot and heel. Pressure Free Tongue. Ortholite insoles utilize 20% recycled content. QU!K Spine is a carbon fiberglass shank. QU!K Flex 4Foot Engineering. QU!K Spring , an EVA foam. QU!KFOAM, a midsole material comprised of an EVA rubber blend with PU coating. Weight 8.2 oz. Drop 9mm.