I purchased this at Akachan Honpo (a baby goods store). I removed the tags, but it has not been washed or worn. I stored it in a plastic bag to keep it clean. I think it's a thin pajama set, perfect for spring and autumn. We have a cat. If you have any concerns about allergies or cat hair, please refrain from purchasing. I plan to ship via Yu-Packet Post. Thank you. Sleeve Length...Long Sleeve