Shockstop Prevent on head accident such as concussion. Anatomically designed for excellent fit. Easy to insert in pocket of any kinds of cap that is pre-designed for it. Features - Excellent impact absorbing performance - Ergonomically designed for excellent Fit - Soft and durable polyurethane Material Material named 2SKIN - Optimal Tear Strength, Tensile Strength, Abrasion Resistance, Bursting Strength - Optimal restoring force unlike EVA or PE foam, it remembers its original shape - Easy to clean - 2 sizes are available Application : Marble and Hardwood Floor installers, Roofers Electricians, Farmers, Automative and Marine Technicians, Plumber, Carpet Installers, maintenance, All kinds of DIY work, Gardening, HVAC(heating, ventilating and Air Conditioning), tactical area.