US Patent 11840858 Modular survival canvas for outdoor shelter

A modular recreational and/or survival canvases are disclosed. Each canvas may be used alone or in combination with other canvases to provide shelter. Each canvas includes a base substrate including a plurality of fastener, a plurality of sleeves, and an outer fringe. In a refinement, the canvas may be of a shape such as a hexagon with alternating fasteners along its perimeter such that it may cooperate with one or more other modular canvases to form larger shelters. In one or more embodiments, the canvases may be combined with a construction block and one or more stakes.