x1 is a quantity of/contains/is made of wattle and daub (woven sticks covered with a plaster-like substance).
From mudri grana je pesxu bitmu marji. Wattle and daub was commonly used for the walls of buildings in many pre-industrial cultures in Europe, Asia, Africa and the Americas, and is still used in some regions. The ingredients of daub vary, but may include straw, clay, mud and/or dung. See also mudga'a.