Description: 1 Piece scuba diving neoprene mask strap with 2 pieces silicone double loop snorkel keeper The diving mask strap cover protects your hair from the tangling of mask straps while snorkeling or swimming Double loop style snorkel keeper can be adapted to virtually any snorkel if needed and also can be used as an octopus holder This low-profile neoprene cover slips over your existing mask strap, making it easier to slide your mask on To install, simply slide one end of your silicone mask strap out of its buckle, slip it through the strap wrapper, and re-thread the end of the silicone mask strap back through its buckle Specification: Dive Mask Strap Material: Neoprene Color: Black Size: Fits over most all mask straps Dimension: Approx. 20.5 x 9 cm/8.07 x 3.54 inch Quantity: 1 Piece Snorkel Keeper Length: Approx. 10 cm/4 inch Thickness: Approx. 3 mm/0.1 inch Hole Diameter: Approx. 2.5 cm/1 inch Quantity: 2 Pieces Color:Black Package Includes: 1 Piece Diving Mask Strap 2 Pieces Snorkel Keeper Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks!