Multi-material, laminated poly-textile chassis construction for superior levels of abrasion and tear resistance, and all-weather performance, Strategically placed abrasion- and tear-resistant reinforcements for additional durability, Removable knee guards housing in internal mesh pockets so they can be positioned to the rider's leg length, Alpinestars 100% waterproof, breathable Drystar® membrane, Pre-curved legs and articulated knee construction with stretch panels on the crotch and knee plus rear yoke stretch panel, Removable 100g thermal lining, Full-circumference waist zipper allows attachment to Alpinestars jackets, Ventilation system includes zippered thigh openings for cooling airflow, Reflective detailing on lower legs to improve rider visibility in low-light conditions, Internal hip compartments lined with tapered PE comfort foam (Alpinestars Nucleon hip protectors available separately), Hook-and-loop leg adjustments for a custom fit, Waist incorporates a 3D mesh interior for comfort, Extended zippered boot gussets ensure a tight seal around the ankle and facilitate easy fitting/removal, Deep zippered side pockets for secure storage, Removable bib braces offer a secure fit