The fabric is not too thick or too thin, making it easy to use all year round! The fabric also stretches well, so it was easy to use even for chubby babies. I am selling this because my baby no longer sleeps in a sleep sack. - Size: M - Material: 100% Cotton - Design: Lemon pattern Swaddle Swaddling blanket Newborn Sleep sack Moro reflex Arms out Swaddle Wearable blanket *Please note that this item has been stored at home, so please refrain from purchasing if you are sensitive to this. *Please understand that there may be wrinkles from being folded for shipping. Thank you.