Neoprene

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Air-Permeable Mesh Construction:Dust shiled with lightweight and breathable design features a full mesh main body construction. Perfect for all outdoor and indoor sports, such as running, walking, cycling, on public transport and other activities.
Adjustable Velcro for Highly Sealed- Adjustable nose clip better-fit face while durable. And it won’t foggy for glasses, back magic strap provide more stability, freely adjust the tightness.