What grade does Keldel diapers belong to?

Mid-to-high-end grade.

Cardel diapers are a mid- to high-end brand of maternal and infant products. The brand has a dedicated and innovative positioning in the field of new maternal and infant retail. It cooperates with Fortune 500 companies and has introduced advanced manufacturing processes and patented technologies such as BASF from Germany, 3M from the United States, and Ruiko from Japan. Cardela diapers have excellent breathability, leak-proof design and fast absorption capacity, and perform well in terms of product quality.