This type of embroidery gets its 3-D appearance from foam that's placed over the area to be embroidered. Foam that is used to add dimension to an embroidery pattern that is typically used on caps. The 3D Foam is placed on the topside of the pattern and stitched over with shortened stitches to cut the Foam. The excessive foam is then pulled away from the embroidery giving a 3D appearance. 3D Foams are available in various thickness.