A U.S. company used a new type of polymer as a material to make a plastic film with tiny air holes. Packaging fruits and vegetables with this film can control the exchange of oxygen and carbon dioxide in the packaging bag, so that the packaging can maintain an optimal atmosphere for slow fruit and vegetable respiration, thus effectively extending the shelf life. Under normal conditions, its freshness can be increased by 1 time. (Li Lingling) ("China Packaging News")
The hard mattress is mainly made of mat or high-hardness sponge. The upper cushion is added with protective cotton, and the mattress is generally rigid. It is suitable for people who have lumbar diseases or relatively fat. In addition, the hard mattress is basically free of springs, and it has a slight resilience, and it will not have a sense of vibration when sleeping, and it will not affect the companion's sleep. This quality mattress will surely give you a better and non disturbing high quality of sleep
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