The Saucony and dolphin Pro 3 isn't so Much an update to the Endorphin Pro 2 as It is a complete overhaul that's largely Due to an updated power and PB foam Designed to produce a significantly more Cushioned feel and a redesigned carbon Plate to produce a springer right the Shoe also features a new thinner Breathable mesh upper along with an Impressive xt900 rubber outsole unlike The Endorphin Pro 2 which had a somewhat Niche appeal when compared to shoes like The vaporfly 2 and the A6 metal speed Sky Plus the Endorphin Pro 3 offers a More accessible ride that can handle Everything from comfortable daily miles To racing everything from 5K to Marathons the natural feel to the design Also makes it a good option for runners Looking for a carbon plate shoe that Lacks the aggressiveness of