Pure natural cotton is skin friendly and comfortable, delicate, soft, and has good moisture absorption, without discoloration or pilling; Environmentally friendly printing and dyeing, without any chemical additives, natural and healthy, safe for newborns to use; The material meets the Standard 100 ecological textile certification and biocompatibility testing certification; The fabric bird's nest positioning support bag is woven from soft, washable cotton knit material, which can be washed and reused. The disposable bird's nest positioning support bag is made of soft non-woven fabric and non flammable polyester fiber material, suitable for single baby first aid, transportation, and other uses.