Celtic & Co 100% Organic Cotton Stripe Dress? SZ L NWT

Celtic & Co. 100% Organic Cotton Stripe Long Sleeve Dress size large. Honestly I’m not sure if this is a dress or a sleep shirt or a lounge dress or what - I couldn’t find any information on it on the internet. Feels like a flannel material. New with tags and from a smoke-free home. Armpit to armpit 23” Length 39.25” TD1-0