This was useful during the changing seasons. The size is 50-70, and it can be used from immediately after birth until around 1 year old. The inside is cotton. It's reversible. There is no name written on it. I think I wore it carefully, but please forgive some wear and tear. -- Soft cotton blue baby vest with elephant embroidery and a pocket. - Color: Blue - Material: Cotton, Polyester - Design: With elephant embroidery - Pocket: Pocket on the front - Buttons: Snap button closure Thank you for looking.