The Scope Dual mask comes standard with a grey silicone strap. Mono mask comes standard with a grey elastic strap. Additional custom strap and color options for both the silicone and elastic include: Red, Blue and Yellow. All strap and color options include a Zeagle Multi-Tool , that can be used for all Scope Masks ( Scope Mono or Scope Dual ), Recon Fins and Zeagle regulators. The silicone strap and color options also include the colored lens retainer kits.