Regular fit Lace closure Tongue Construction offers easy entry and adjustable fit LIGHTLOCK UPPER is made to naturally contour to your foot and stretch for ultimate comfort LIGHTSTRIKE PRO gives ultimate cushioning and lightweight energy return Proven To Be The World's Most Winning Shoe, The Adizero Adios Pro Line Is The Pinnacle Of Adizero Racing Shoes. The Adios Pro 4 Is Made For Fast Runners Who Want To Experience Faster, With Enhanced Features Designed To Optimize Running Efficiency. The Carbon-Infused Energyrods 2.0 Provide A Seamless Transition From Heel To Toe For A Snappy, Efficient Stride. In The Midsole, A New Rocker Point Offers Improved Running Economy. A Double Layer Of The Best-In-Class Ultralight Lightstrike Pro Ensures Cushioning For Every Quick Stride You Take, Helping You Maintain Energy Over The Long Term. The Shoe Rides On An Outsole Built With Continental Rubber For A No-Slip Transition During Toe-Off, As Well As Lighttraxion, Designed To Reduce Weight Without Sacrificing Grip.