Features: -Fabric is 100pct organic cotton french terry lining, breathable air-mesh exterior.-Adjustable snap strap. Specifications: -Recommended beginning age (front carry) 2-3 weeks. Dimensions: -8.25'' H x 7'' W x 4'' D, 0.5 lb. The Onya Baby Booster is lightweight, breathable and securely snaps into your Onya Baby carrier. Its unique design comfortably cradles while allowing you to adjust the boost as your baby grows. 100pct certified organic cotton terry. A breathable outer layer under your baby's bum keeps them cool. Snap closure that allows for height adjustability and secure attachment to your Onya Baby carrier.