3MOutdoor Window Insulation Kit, Clear Window Film for Heat and Cold, 5.16 ft. x 7 ft., Covers Two 3 ft. x 5 ft. Windows

One out of 2 packages was completely unusable because the plastic was fused together and although we've used these products for years without any problems, these ones keep coming off. The sticky tape condition was compromised. Have had to order more of the window kits (and pay significant shipping) but hope they arrive in better shape or next time we'll try a different product or order from elsewhere.