Rollerblade - Lightning 4 (Silver/Black) - Men's: Intended for fitness-oriented skaters who want maximum comfort along with the best technical features and performance. PFS (Progressive Fit System) Specialized ADV features CoolMax(R), Specialized footbed, custom fit, breathability, and Lycra slide for easy foot entry. Specialized Footbed features a shock absorber in the heel, vents for breathability, anti-bacterial surface treatment, terry cloth finish for added comfort, and an anatomic footbed created in two different materials: one structuring base material, stiffer at the rear and one surface material for comfort. Liner features CoolMax fabrics which transport perspiration away from the body to the outer layer of the fabric, where it can evaporate quickly. At the same time, the uniquely shaped fibers provide great breathability, even when wet. Closure system utilizes a powerstrap and an adjustable locking buckle. Three power straps provide secure fit with unmatched support, while ensuring ultimate energy-transfer to the frame. Aluminum frame, developed by Rollerblade, is very light and performance. It can be adjusted laterally to customize the boot-frame alignment for different skating styles. 84mm/84A Rollerblade LITE wheels. ABEC 7 bearings. Shock eraser brake on skate.