The foam is made with a carefully picked material that is tested to be durable, water-resistant and soft to the touch.
The foam has a velcro (loop) backing so you can attach it to your fathsark HD2 > HDO directly with the default velcro tape. The set will also come with an extra velcro tape as spare.

Specifications:
Foam Thickness: 8mm
Foam with velcro: 10mm

Package Includes:
1 x Goggle Foam
1 x Velcro with Adhesive backing.