-High comfort neoprene ankle-strap cuff. -Extra strong, fray resistant 'Rip and Grip' Velcro on cuff and rail saver to ensure you never part from your board. -Purposed designed high-strength urethane cord provides the correct amount of controlled stretch and return. -High tensile brass swivel in rail saver to reduce leash tangling. -Available in 2 thicknessess- Comp(5.5mm) and Regular(7mm)