Design: Soft, plush mesh upper for breathability and comfort Angular midsole design reduces weight Adjustable lace closure for a secure fit Upper features no-sew overlays for a sleek fit and feel In-Shoe Comfort: FuelCell midsole foam with approximately 3% bio-based content delivers a propulsive feel to help drive you forward Energy Arc pairs sport-specific carbon fiber plate geometry with strategic midsole voids, designed to increase stored energy to deliver a higher amount of total energy returned Durability & Traction: Outsole designed for superior traction Additional Details: Bio-based content is made from renewable resources to help reduce our carbon footprint 4 mm drop; due to variances created during the development and manufacturing processes, all references to 4 mm drop are approximate