The Inov-8 All train 215 is a new and highly versatile training shoe for the hard-working athlete. This super lightweight training shoe provides superior stability while allowing for powerful and explosive movements when they're needed most. This shoe is perfect for tackling HIIT, Circuit training, bootcamp classes, speed workouts, and endurance strength workouts. The sticky rubber outsole and Heel-lock lets you dig in and take off without losing power while the ADAPTERFIT Met-cradle wraps around the foot to ensure more secure, natural movement. A sleek profile provides a cool, stealthy look that goes seamlessly with your favorite gym attire.Upper: ADAPTERFIT Met-Cradle adapts to the movement of the foot while providing a natural, yet secure fit. Midsole: The Fusion midsole compound gives lightweight cushioning for long-lasting comfort while the Meta-flex groove at the forefoot provides flexibility for explosive power.Outsole: Geometric outsole design is built with triangular claw-cleat shapes in multi-directional placement for excellent traction.