1, Hot melt Shanghai Everspring filter bags using advanced hot-melt joining technology, ensure the filter bags have the best bonding strength to prevent leakage. 2, Sewing Shanghai Everspring filter bag sewing extremely rigorous, solid and durable, the sealing effect sewn to maximize engagement. Sewing does not contain any ingredients such as silicone oil lubricants, avoid the common problem of secondary pollution sewn bag exist.
