Ideal for: Competition. Cushioning: PWRRUN HG/PWRRUN PB. Surface: Asphalt. Insole: SRS. Drop: 8 mm (39.5/31.5 mm). Distance: 10K Half Marathon Marathon. Technology: S-Curved Carbon: A carbon plate allows for a smoother and more dynamic foot roll. 8mm Offset PWRRUN PB/ PWRRUN HG: Unleash your full potential with PWRRUN PB cushioning. This innovative foam offers higher energy return and improves the efficiency of your stride. SRS: Try our new SRS (Super Responsive Sockliner). We challenge you not to bounce. FORMFIT: Get a personalized fit with Saucony's FORMFIT technology. The shoe adapts to the unique shape of your foot. SPEEDROLL: Provides propulsion and forward motion of the foot. Weight: 212g. Push it to the next level in the Endorphin Pro 4, with PWRRUN PB and PWRRUN HG for propulsive movement and a snappy Carbon plate for responsive speed. Lightweight Breathable Mesh Upper: The lightweight mesh upper is engineered to provide support, ventilation, and comfort. The breathable and airy single-layer mesh allows air to flow throughout the shoe to remove any unwanted heat buildup, so you remain cool, dry, and comfortable at all times. Be race-ready thanks to the silky smooth heel liner and integrated tongue, which works with the traditional lacing system to give a comfortable sock-like feel. PWRRUN PB and PWRRUN HG Midsole: With super responsive shock dampening that's proven to perform, PWRRUN PB technology provides lightweight and springy cushioning to keep your feet comfortable at all times. It's the key to personal bests on race day and every day. The PWRRUN PB Foam technology is a full 40% lighter than its PWRRUN predecessor, keeping weight to a minimum and allowing you to run faster and steadier for longer. Sandwiched between two layers of the ultra-resilient and extra-soft PWRRUN PB Foam, the Endorphin Pro 4 features a Carbon-fibre plate that makes for powerful transitions to fuel every stride to get you to the finish line faster, delivering longitudinal stiffness for maximum metabolic efficiency. The revolutionary technology supports your foot as you move through your gait cycle and has been teamed with SPEEDROLL technology that works to propel you forward effortlessly at toe-off for a more dynamic run. Allowing you to run faster, not harder. The top of the midsole features PWRRUN HG technology, which provides lightweight and springy cushioning to keep your feet comfortable. The super foam is lighter and provides more rebound than previous PWRRUN foams, allowing you to squeeze all the speed you need to hit your new PB. The combination of foams allows for maximum bounce and cushioning. XT-900 Outsole: Designed to keep you in control on the track, the Saucony Endorphin Pro 4 Running Shoes feature an XT-900 outsole. The rubber can form a solid connection with the ground that provides a firm base for you to push off from, making your gait cycle more efficient. The chevron tread pattern provides traction on wet pavement and compact dirt and lets the sole easily flex, so you get fluid, unhindered movement. Reinforced high-abrasion zones provide optimal traction and durability.