The ergonomic One Babybjorn baby carrier makes it easy for you to give the baby the important closeness that strengthens your parent-child bond from day one! The One baby carrier by Babybjorn's flexible fabric lets you both see & feel that you're carrying your newborn baby in a natural position, with their back in a C curve. Facing you (two heights), facing out, or on your back: you decide which position is best for your child from the 4 different positions to choose from! In this way, you can carry him comfortably from birth up to 3 years of age. ONE BABY CARRIER BY BABYBJORN'S PLUS POINTS Four front & back carrying positions. 2 height positions, including an upper heigh position for newborns (min 3.5 kg) with a built-in infant insert. Wide, fully adjustable seat area ensures an ergonomic leg position. Padded shoulder straps gives you superior carrying comfort. Waist belt relieves back & shoulders. Adjustable head support can be folded or unfolded as the child grows. You can easily swivel the entire baby carrier from your front to your back without having to remove the baby. MORE INFORMATION We recommend that you only start to carry your baby on your back after the age of twelve months! The International Hip Dysplasia Institute has testes the Baby Carrier One Air & acknowledges it to be "hip-healthy". All Babybjorn baby carriers are free from harmful substances & comply with all the Oeko-Tex® 100, Class 1 standard for baby products. From birth & up to age 3 years approx. Min. 3.5 kg/53 cm. Maximum 15 kg/100 cm. Your child must be at least 5 months old & weigh 12kg at the most to be placed facing out in the baby carrier. Use the straps between the legs if the child weighs 3.5 to 4.5kg to reduce the size of the leg openings. Machine washable at 40ºC. Wash separately. We recommend that you use an environmentally friendly, mild & bleach-free detergent. Do not tumble dry. The One baby carrier complies with all European & US safety standards for baby carriers, EN 13209-2:2015 & ASTM F2236, respectively. Ergonomic Front & Back One Baby Carrier, by BABYBJORN in 60% cotton, 40% polyester.