There are differences. Silian mattress is a high-quality mattress brand with production bases in Tianjin and Shanghai. The production technology and technology of the two production bases are the same, and there will be some subtle differences due to the different regions and environments. Tianjin's climate and temperature are relatively low, so it will pay more attention to the balance between warmth and hardness of mattresses; However, Shanghai's humid climate will pay more attention to the air permeability and moisture resistance of mattresses.