It is good the permeability hard cotton mat

摘要

Problem to be solved: to provide a cotton mat having easy air permeability to be secured from the upper and lower sides and the left and right sides, which is easy to bend and easy to store.In the case of a cotton mat, a square column having a square section is cut in the width direction, and the cut out rectangular column is inserted into the cut out wall, and a quadrilateral column fitting structure is formed, and the same column is fitted. An inserting structure is formed on a plurality of cotton mats.