INOV-8 MEN'S FASTLIFT 335 TRAINING WORKOUT SHOES The original FASTLIFT is back! Delivering stability, support and structure in the heel and mid-foot, this remains an outstanding option for weightlifting. Unlike some other lifters, the FASTLIFT 335 boasts excellent flexibility and comfort, meaning it can be used for all aspects of workouts and WODs, not just for weightlifting. We have graded the fit of all our shoes from 1 to 5 to make it easy for you to find the perfect fitting shoe. All our shoes are designed with Met-Cradle technology to lock down the mid-foot for a stable hold. Where they differ is in the toe box. Grade 1 represents our closest, most precise fit. At the other end of the scale, Grade 5 has the widest fitting toe box. We have meticulously studied the foot and its function during the gait cycle and also the interaction between the foot and the terrain. We have used this knowledge to develop our fitting scale. For technical footwear a good fit is essential to enhance your performance. As a rough guide, Grade 1 represents an industry B fit, while Grade 5 equates to a 2E fit in the forefoot.