Adizero Trx FG The Lightest shoe in anodized purple/electricity/infrared.Upper:Sprintskin drastically reduces the adizero's weight. Innovative internal Tpu support bands in the upper and offer support and stability.Insole: Ultralight sockliner is designed to not add bulk. Comes with second pair of comfort sockliners.Outsole: Sprint frame for lightweight stability. Trx Tpu outsole has a new stud configuration that improves your balance at top speeds. For use on firm fround. Weight: 5.8 oz.