Grave blankets are customary headstone coverings during winter months and the holidays. The cemetery arrangements cover a portion or most of the plot and are highlighted with a series of holiday-themed ribbons or flowers. A grave blanket typically has a styrofoam base to it typically a few inches thing. Once in place you take branches from a pine tree and push them into the base and just arrange it in the shape that you want. Once you have it in the spot you want you can take hangers and bend them so they fit down through the branches and over the styrofoam base and push them in the ground to hold the grave blanket in place.