Mesh can be a great addition to a Christmas tree, adding texture and dimension to the overall design. To add mesh to a tree, you'll first need to gather your supplies. You'll need a roll of mesh (you can find this at most craft stores), scissors, and some pins or clips. Once you have your supplies, begin by cutting a strip of mesh that is approximately the same length as the width of your tree. Then, begin weaving the mesh around the branches of the tree, securing it in place with pins or clips.