This is a 3-pack 6-pack of sleeveless ribbed tank tops for babies and toddlers by Bambini Cotton made in the USA. These are great undershirts to wear under clothes in the winter or by themselves in the summer. Made with 100% cotton, these are super soft and stretchy. These run true to size. Please refer to the size chart in the images for measurements. Size available : NB (0-6 Months), S (6-12 Months), M (12-8 Months) and L (18-24 Months) Material : Cotton 100% Consumer Product Safety Improvement Act (CPSIA) Bambini Infant Wear is committed to the compliance with all industry and federal certification standards which are applicable to its products. We are further committed to meeting all requirements outlined under the Consumer Product Safety Improvement Act (“CPSIA”). Please be assured that we are in full compliance with the CPSIA regulations. Our merchandise is tested on an ongoing basis by 3rd Party Accredited Laboratories approved by the Consumer Products Safety Commission.