Air Conditioner Cover keeps out cold drafts and dirt! Energy-saving cover reduces costly heat loss through vents or grille work, all winter long. Quilted poly/cotton exterior has elastic edge for snug fit. For window or through-the-wall units. Machine washable. 3 sizes: \r\nSmall (12-14" H x 18-20" W), \r\nMed. (15-17" x 21-24" W), Large (18-20" H x 25-28" W).