DockMats work the same as Boatlift Mats. They provide a solid surface for roll-in or standard docks. They create a firmer surface to install and remove docks. During the summer, they support docks and provide a weed-free area under your dock. The standard DockMat is 2 x 4m for docks up to 1.7 meter wide. The Large DockMat is 3 x 4 m for wider sections.