Durable four-way stretch poly / spandex In-Motion chassis construction allows unrestricted body mobilityMoisture wicking material properties keep the body cool and dryTaped interior sewn seams for extra durability with less skin irritation Minimal seam chassis design for maximum stretch performance and comfort Laser cut perforation vents for increased airflowTPU knee overlays Sticky silicone printed inner waist keeps jersey in placeZipper-less waist opening for maximum comfort with reduced weightPrecision-fit, ratchet waist closer system Durable full grain leather inner knee grip panelsAramid fiber backing on the kneeMaterial CompositionShell: 92% Polyester/8% Spandex Knee Panels: Cow Leather