The benefits of using Brinmar window unit covers are as follows:

An Ideal way to prevent winter drafts and save heat
Save money & energy, by keeping the coil clean of debris
Protects equipment & provided peace of mind
Convenient to install with elastic cord & barrel locks
Helps maintain the appearance of the equipment
Fits hundreds of different models of window unit air conditioners
Open-bottom design is compatible with mounting brackets
Window unit covers are available in 4 common sizes
Material treated for protection from mold, mildew, cracking, and UV
Heavy duty 24 oz material resists ripping and tearing
Strong supported cloth backed vinyl prevents tearing
Reinforced at key stress points