Age range: 0-9 monthsrecommended usage range: from birth (min. 4 kg) to 9 months (max. 12 kg). it does not cause back, waist and shoulder pain. a product can be sold by more than one seller. the sellers of the products offered for sale by more than one seller are listed according to the price they set for the product, seller ratings, delivery status, promotions on the products, whether the cargo is free or not, whether the products can be delivered with or not, and the stock and category information of the products. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.