The adjustable toe blocks - pr from North Water is made from heavy-duty 28 oz. vinyl, with nylon wing nut adjustments. These toe blocks help secure your feet to make every movement optimized. They are ideal for breaking through a strong eddy fence, rolling or using subtle weight shifts for surfing. With these toe blocks, your foot can sit flat or arched. They are perfect solution for advancing your surfing skills. Specifications 8"L x 6.25"W x 3.5"H Color: Grey/Brown Length: 8" Width: 6.25" Height: 3.5" Normally Ships in 0 to 2 Business Days Features Benefits Easy to adjust Adjustable up to 6" Superior construction Made from heavy-duty 28 oz. vinyl Uses Allows you to use your body weight more efficiently for controlling your canoe Availability Comes in pairs Additional benefits Comes with nylon wing nut adjustments Guaranteed Workmanship and Performance