Men's Specter 2 (Blue/Blue) See and Be Seen The SD100 is equipped with

The SD100 is equipped with a full-length FuelCell midsole that offers a propulsive feel perfect for racers striving to go faster

Designed to shine

zippers at the ankles

Rudolf Bionic Finish® Eco Technology on the Surface Surface assures that light rain and sleet bumps

where warmth and mobility are equally important

Men's Specter 2 (Blue/Blue) See and Be Seen The SD100 is equipped withPick up the pace and mileage with Specter 2, the second generation of our high cushion performance trainer. Whats new? The leveled up midsole is now fully Pebax Powered, delivering snappy response and high energy, while maintaining the lightweight ride of the original. But thats not all, we boosted the cushioning for even more comfort and revamped the outsole to add extra durability and traction. Lace up in Specter 2 and embrace the journey. Style