Strengthen your feet and enhance speed with the Faas 100 R. It's built for runners who want to feel light and fast as well as get the most out of the ground beneath their feet. Ideal for training, this shoe has the least amount of cushioning in the Faas line with a 0mm heel to toe drop that helps strengthen feet and lower extremities over time. Lightweight FaasFoam+ is packed into the midsole for increased resiliency and step-in-comfort. The high-rebound EcoOrthoLite® sockliner provides higher responsiveness through the gait cycle, while the gusseted tongue secures fit. Lastly, the minimal yet highly breathable single layer mesh is sandwiched between bonded overlays and an internal suede forefoot support structure to provide an extremely lightweight one-piece upper. Oh, and, added bonus: this version just so happens to glow in the dark. It sounds like a lot. But it's lighter than heck. You can thank us after you smash your next PR. Features: Enhanced with glow-in-the-dark and reflective elements for added visibility. Women's-specific upper for a sleeker, more feminine look. Lightweight single layer mesh upper for optimum breathability. Bonded overlays and an internal suede forefoot support structure for extremely lightweight support. speedCELL designation for lightweight, responsive design engineered to offer your body what it needs to move faster and help you get where you're going. Gusseted tongue for a secure fit. Molded high-rebound EcoOrthoLite® sockliner for breathability, comfort, and fit. Lightweight FaasFoam+ one-piece midsole (PUMA's new proprietary blend of foam and rubber) for improved resilience and increased step-in comfort. EverTrack high abrasion resistant rubber featured in high wear areas for added durability. Bonded PUMA Formstrip at medial and lateral sides. Faas PUMA Logo label at tongue, with PUMA Cat Logo at forefoot and Faas callout at heel. Heel to toe drop: 0mm.