3MM CLASSIC MESH WITH 85% LIGHT BLOCKING RATING: Constructed from 3 mm mesh with A.C.T. Air Channel Technology for unrestricted airflow. 100% polyester. 1" (2.54 cm) trim on top and bottom. Machine washable. FITS FULL-SIZE STYLES WITH A 52" x 28" (132 CM x 71 CM) MATTRESS: Install long 11" x 111" (28 cm x 282 cm) and short 11" x 82" (28 cm x 208 cm) panels to cover 4 sides or only the long panel to cover 3 sides. Do not use on solid end styles or mini cribs.