Alpinestars A-Line Knee/Shin Guard Highly flexible, multi-material knee and shin guard constructed from durablepoly-fabric outer, breathable laminated impact foam and 3D stretch mesh Flexible design Lightweight Breathable shell 50% Polyester/25% Polypropyle/20% Polyethylene/5% Polyamide Highly flexible multi-material knee and shin guard constructed from durable poly-fabric outer Lightweight and strong polymer protectors are vented to improve airflow and cooling performance Breathable knee sleeve constructed from vented Neoprene and stretch mesh for secure fit and to promote ventilation 3D mesh inner lining gives high levels of skin comfort, moisture-wicking and breathability High-absorption bio-foam padding gives added impact dispersion in critical impact areas; Breathable laminated impact foam