These are great pajamas - the contrast piping, colorful buttons, the subtle stripes in the fabric - the details were well thought out with these. I was a little worried about the polyester blend being too warm for the pants/long sleeve style in our Midwest summers, but the fabric is lightweight and these were perfect to sleep in! The material is so soft, and doesn’t wrinkle like a poplin pajama would. I’m typically a size M, but sometimes between M/L and based on the sizing chart decided to order an L and they fit perfectly.