This is a TAO rash guard from 2024. I purchased it from an overseas website this year and only tried it on. My 1.5-year-old son can wear it, but it's a bit small. The chest width is small, and the sleeves are long. I think it can be worn from before 1 year old. I'm selling this because I secured a larger size. I also paid for international shipping, and I purchased it for about 13,000 yen. Are you looking for a rash guard?