1. formaldehyde damage. Some small brands use gluing technology in four-season mats. In order to reduce the cost, they even use inferior glue. Lead to excessive formaldehyde, which is harmful to health. The brand side adopts fire compounding with relatively high cost, that is, heating makes the sponge melt and the cloth stick together, without any glue, which is completely green and environmentally friendly and requires high equipment cost.

2. Product deformation. Because of the good permeability of sponge, most car seats in the world are filled with sponge, which can quickly match the temperature inside the car. The four-season mats of big brands on the market are also made of highly elastic sponges, which have good air permeability. The deformation of four-season summer sleeping mat products is mainly caused by the use of inferior sponges and recycled sponges in some small brand products.

3. The filler is shoddy. Four-season summer sleeping mats are mostly made of Chinese medicinal plants such as cassia seed and buckwheat hull. Due to the rising raw materials of traditional Chinese medicine, some small brands are shoddy and even doped with sand and black cotton in pursuit of profits.

4. The air permeability is not good enough. This reason is mainly caused by the unreasonable proportion of fillers. The massage effect of cassia seed is good, but if all cassia seeds are used, the permeability is poor. Buckwheat shell has good air permeability but poor massage effect, and experienced manufacturers will fill it according to a certain proportion.

Million car purchase subsidy