Pearl Izumi ratings Average Customer Rating Based On 1 Reviews 5 Star (1) 4 Star (0) 3 Star (0) 2 Star (0) 1 Star (0) Size: 100.00% True to Size (1 ratings)100.00% True to Size Width: 100.00% True to Width (1 ratings)100.00% True to Width Arch Support: 100.00% Excellent (1 ratings)100.00% Excellent All Pearl Izumi run shoes are designed to be the perfect interface between athlete and footwear. Pearl Izumi shoes are designed and tested to optimize the runner’s performance and running experience through purpose driven product solutions. Our platform combines Seamless Uppers + 360 degree lacing + guidance with the SyncroFrame system to deliver Comfort, Anatomic Fit, Cushioning and Stability. 1:1 is the realization of everything we know (so far) about how athletic performance can be optimized through apparel, footwear and equipment. Think of 1:1 as the perfected, zero-tolerance, interface between athlete and gear. Gear designed and constructed to fit perfectly to the body in motion. Gear engineered to feel and perform as well at mile 26.2 or 100 as it does at mile 1. 1:1 is the perfect balance of anatomic fit, performance engineered materials and the personal interface between athlete and gear.