Enter the race in a premium performance running shoe designed to keep you moving forward with unstoppable strength mile after mile. Design: PERFORMANCE TESTED: Proven in Heeluxe lab testing to have the right amount of cushioning with 29% softer forefoot cushioning compared to previous Ryka running shoes + a snug and secure fit with extra collar padding + the support and flexibility expected from premium cushioned running shoes. RYKAQ TECH: Built for a woman's quadricep muscle Q ANGLE with a narrower heel, roomier toe + contoured cushioning for stability. MATERIALS: Breathable high density engineered mesh upper + padded tethered tongue with built-in tongue pull + extra padded heel + high-abrasion brushed collar lining for longer wear + fabric lining. CLOSURE: Lace-up for a secure fit. INSOLE: Anatomical Q:Insole for arch + heel support with anti-odor treatment. OUTSOLE: Compression molded rubber with decoupled molded heel and arch support pod. In-Shoe Comfort: MIDSOLE: Lightweight Q:Foam tuned for running with maximum shock absorption and high energy return. Durability & Traction: OUTSOLE: High abrasion rubber strategically placed to optimize traction and shoe weight reduction Additional Details: This shoe runs slightly large. We recommend sizing down 1/2 size for the best fit. WEIGHT: 226g / 7.97oz per shoe Drop: 7.5 mm RYKASHIELD STAIN PROTECTANT: Product works best by cleaning immediately after a spill by running cold water over the shoe. Use only cold water to remove the following stains: dirt, mud, coffee, ketchup, blood. Do not wipe the shoe with any product, including water, as it can cause the stain to be absorbed into the material. Results may vary and Ryka does not guarantee that this product will work to remove any and all stains, particularly after repeated use.