Abstract: The present invention relates to a sheet provided with tilted stem groups (1) and (4) present on the front surface of a base layer (2), and tilted stem groups (2) and (5) present on the back surface of the base layer (2). Tilted stems (3) present both in the tilted stem groups (1) and (4), and in the tilted stem groups (2) and (5) are such that: multitudes of the tilted stems (3) are formed close together, the tilted stems (3) protrude in a direction tilted with respect to a vertical direction, the tilted stems (3) protrude in one direction from the surface of the base layer (2), and the tilted stems (3) are tilted in directions symmetrical across the base layer (2).