This is the Zeagle Elastic Color Strap for Scope Mask Customize the elastic strap on your Scope Dual and Scope Mono with additional custom strap and color options. Additional colors include: Red, Blue, Yellow and Black. Scope Dual mask comes standard with a grey silicone strap. Scope Mono mask comes standard with a grey elastic strap. All strap and color options include a Zeagle Multi-Tool that can be used for Scope Dual and Mono, Recon Fins and Zeagle regulators.