Inov-8 Men's FastLift 370 BOA Cross-Training Shoe 100% Manmade Imported Standard Fit Synthetic sole Utilizing the industry leading boa closure system the next generation fastlift delivers a precise fit as well as custom fit with a smooth even closure and no pressure points Boasting unrivalled structural stability the shoe features a stretch free boa closure system that allows functional fitness athletes a stable platform for absolute power transfer Micro adjustability is guaranteed with a quick one handed turn of the boa dial 16.5 millimeter heel