MAXLER Jean Biker Jeans for Men Motorcycle Motorbike Riding Kevlar Jeans 1617 Grey 32 Outshell: Comfortable wear from flexible spandex fabric. (14oz DENIM) Design: Thigh zipper functionalizes as the attachable knee protectors and an air vent mesh. Knee protectors are adjustable depending on your height and the Kevlar is used at hip and knee. Calf zipper stabilizes the knee protectors when riding on a motorcycle. Style: Attachable knee protectors allow the riders to wear the jeans as a casual jeans in daily life. Made in South Korea