Durable, efficient window AC seal for longterm performance. Key benefits: Durable construction: reinforced seams and density material resist deformation, maintaining seal integrity for years. Improved cooling and efficiency: dual sealing barrier minimizes heat transfer, helping reduce energy consumption and keep rooms comfortable. Waterproof protection: density polyester fabric plus a hermetically sealed peripheral edge blocks rain and moisture for reliable operation. Easy universal fit: adjustable width fits most standard window air conditioners and window configurations, enabling quick installation and a tight seal. What you get: Functions and protection: seals around the AC unit to prevent drafts and leaks; withstands regular use and outdoor conditions. Compatibility: designed to fit a wide range of window sizes and AC models. Materials and durability: density polyester fabric, reinforced seams, waterproof and rugged construction. Use scenarios: Home or apartment cooling: improves comfort and reduces running time by minimizing heat leaks during hot seasons. Rainprone or humid climates: protects against moisture intrusion around the unit for consistent performance. Shortterm rentals or offices: quick, dependable sealing that can be installed or removed as needed.