Troy Lee Designs GP Drift Pants Designed with comfort and minimal weight in mind, the GP gear also offers the durability that TLD is known for. Breathable and flexible material allow a custom, comfortable fit for any rider. The versatility of the line make it the perfect choice for all types of riding and racing conditions. Ride Fit. 600D Polyester fabric provides durability in key areas. Stretch yoke in rear seat and groin areas to enhance mobility. Silicone on inside waistband for added jersey grip. Ratchet waist adjustment system. Articulated knee technology. Inside knee leather panels. Fabric is certified Blue Sign approved.