Specially designed for walk-in coolers and freezers. These flexible, transparent, overlapping PVC plastic strips part just enough to allow easy passage, then fall instantly back into place affording maximum efficiency as an air seal. .080" thick, 8" wide strips with 2" overlap. USDA nylon reinforced PVC strips for temps to -30°F. Made to fit any size and shape door opening. Mounting hardware included. Heat sealed loops that swivel freely on round mounting bar. Unique loop style design eliminates tears. FYI: When determining sizing, buy a strip door at least 4" wider than actual door opening.