Release pressure：disperses baby's weight,relieve mother's pressure of shoulder，waist and abdomen. Cool and breathable:Adopt cellular cotton,it is sweaty,cool and breathable. Humanized design:"M" posture protects infantile articular cartilage development. Adjustable bucket seat:Freely adjustable crotch width design provides baby more comfortable. Suitable for all postures and sizes:The belt can be adjusted to 110 cm\43.3 inches, suitable for 5~20 kg\11~44 lbs baby.