Dual Density Helm Pad - 16" x 39" 20mm - Large - White/Storm Gray with Routed SD Logo406.4mm x 990.6mm x 20mmOur softest, most comfortable SeaDek pad yet! Your knees and back will thank you after a day on our Dual Density helm pad. Featuring an ultra-comfortable low-density 17mm foundation with our legendary standard 3mm brushed top layer for traction and durability, no boat is complete without this essential addition. All Dual Density Helm Pads utilize a robust 3M™ adhesive for an easy peel and stick application. | Dual Density Helm Pad - 16" x 39" 20mm - Large - White/Storm Grey w/ Routed SD Logo