Package Included: 1x Work Safety Specification: Product name:Breathable Safety Model:922171 Exterior : Polyester/cotton Inside loop : polyethylene high density. Reinforcement of loop : foam :gray, blue, yellow Size:Adjustable(55-62cm/21.6”-24.4”) Impact-resistant baseball style bump cap. Very ventilated polyester/cotton with mesh fabric. Lined with polyethylene and comfortable EVA foam shell to absorb shocks. Adjustable single size by buckle 55-62 cm. Note： -Due to the different display and different light, the picture may not reflect the actual of the item. Thanks for your understanding. -Please allow a little difference due to manual measurement. a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a