THE PUMP The Advanced Pump is our most efficient Pump to date for personalized fit with added comfort. QUARTER Ribcor Flex is a lightweight structure that provides enhanced forward flexion and durability. CORE Lightweight elite synthetic core for enhanced support and durability. LINER Dual-zone lightweight Tricot for a comfortable fit and durability. OUTSOLE Vented low profile injected outsole maximizes energy transfer with moisture management. FOOTBED Molded CCM footbed for comfort and durability. TOUNGE Two-piece high-density felt tongue provides excellent fit and comfort. HOLDER/RUNNER SpeedBlade 4.0 Pro has a non-replaceable stainless steel runner that is long lasting and takes advantage of the additional 4mm in height to increase the angle of attack.