Fits sliding, casement, and double hung windows. This window insulation set includes all hardware and clear installation instructions for a fast, easy setup in minutes. Material and construction Reinforced weatherresistant fabric for durable performance. Heavyduty window sealing accessory designed to resist wear, deformation, and heat exposure for longlasting reliability. What it does Seals gaps in residential or commercial settings to help maintain consistent indoor temperatures during heatwaves or winter drafts. Who it's for Ideal for homeowners, renters, and office spaces seeking an effective climate control solution. The fabric seal adapts to a variety of living and working environments. Use scenarios Winter draft prevention in a living room or bedroom with aging windows to reduce heat loss and improve comfort. Summer cooling support in a small office or storefront with large windows to help maintain a comfortable temperature and reduce AC load. Quick, nonpermanent sealing in rental units where structural changes are not allowed. Key attributes Function: seals gaps to stabilize indoor temperatures. Compatibility: fits sliding, casement, and double hung windows. Size: includes all hardware for installation. Material: reinforced weatherresistant fabric. Performance: resistant to wear, deformation, and heat exposure for longterm reliability.