I purchased the size 80 one-piece and the size 90 short-sleeved shirt separately, but I used to dress my child in them as a set like this! The one-piece is made a bit large (with adjustable shoulder straps), so it fit perfectly when wearing size 90! The short-sleeved shirt is made of a flexible fabric ☺︎ How about it for this time of year? There is a stain around the chest area of the one-piece! Otherwise, there are no noticeable stains! This item is not sold separately! I will fold it small and ship it via Yu-packet Post! Please purchase only if you understand that this is a used item!