Product Features: 
Can be attached to a window booklet to easily create double windows. 
Insulates heat and saves electricity in winter and summer. 
Transparent type that allows you to see the outside clearly. 
Precautions for Use: 
This product is not a product that can be attached directly to window glass. 
Please do not expose this product to strong impact. It may be damaged. 
Please wipe off dust and dirt with a damp cloth. 
Does not shatterproof glass. 
The included double-sided tape may retain the glue depending on the usage environment (temperature and humidity).