AUYIN's 205 Series Polyurethane Seating is specifically designed for outstanding comfort and long lasting use in the toughest workplace environment. Built with extraordinary care, these durable chairs offer total body support with advanced ergonomic features that improve productivity and reduce worker fatigue. Our rugged self-skinned polyurethane seat and back resist stains and damage from punctures, grease, water, and chemicals(Acid-Resistant). Ventilation ribs increase air circulation, comfort and ease of cleanup.