Alpinestars Bionic Pro Plasma Knee Guards Designed for all types of off-road adventures, the Bionic Pro Plasma Knee Protector combines lightweight, breathability, and protection seamlessly. It boasts a removable Nucleon Plasma knee protector set within a dual-structure chassis, designed for optimum abrasion resistance on the outside while maintaining superior breathability inside. This innovative knee protector aims to deliver peak performance for riders across all off-road terrains. Features: Two independent thermoplastic shells Slip joint construction ensures high levels of articulation Wide elasticated top strap delivers superior comfort and a secure closure Viscoelastic material engineered from bio-based polymers and formed into a structure that is pliable in all directions Lightweight and highly ventilated protector offers strong impact force dispersion and absorption Constructed from Usda certified bio-based eco-friendly and sustainable impact absorbing material Constructed with a soft tactile inner padding for enhanced rider comfort Pre-shaped construction features soft touch perforated stretchable padding for enhanced comfort and superior airflow Anatomically sculpted to keep the protector securely in position Removable for easy cleaning CE level 2 certified Sold as a pair