This onesie is good for warmer weather. My baby runs hot so we like the thin material. It's a bit stretchy, more flexible than stretchy. It's thin but not cheap (well made). Also onesies from this brand just look kind of dressy. They photograph very well. We'd gotten a few other pieces previously from ChubbyBubbyBear (same stuff, slow shipping). You need to wash in cold water and don't use high heat for drying. I'm happy to report they've held up well and folks often comment on how well dressed our babe is. I used the size chart from the company and needed to size up bc my baby is big for his age and these organic pieces will shrink a tad.