I'm assuming you meant "Mature Lay" or more commonly referred to as "Lay of the Land" or a mature layout; however, "Mature Laid" seems to relate most directly to paper and its textures.
During the formation of laid paper, the pulp is formed into sheets on a wire mesh mold and deckle. The wires on the mold leave a pattern of slightly raised lines on the finished paper, which can give it a textured or ribbed appearance. These lines or textures are often referred to as "laid lines."
Mature Laid paper refers to a type of paper texture or finish that originates from the papermaking process. The term "laid" in paper terminology describes the pattern of wire mesh used in the papermaking process.