This is the Step One Air by POGNAE. I mainly used it indoors as a second baby carrier. The baby would sleep well, perhaps because their bottom was fully supported and felt secure. The waist belt allows for size adjustment, making it easy to share with family members (fits waists up to 118 cm). The mesh material prevents stuffiness and keeps you cool while carrying the baby. It can be machine washed (cleaned at home). - Color: Dark Charcoal - Recommended age for use: From 2 weeks old (3.5kg) to 14 months old (11kg) Thank you for looking.