These long sleeve Onesies® Bodysuits are essential for baby boy outfit. Easy to wear as a one-piece outfit in warmer months and simple to layer on cooler days. Crafted from 100% cotton to be gentle on sensitive skin, these outfits are easy to slip on either as a pullup or pullover. High-positioned snaps make it easy to change a diaper without removing the entire outfit. If an outfit change is needed, the expandable lap shoulder neckline makes it easy to pull the dirty outfit down over the legs. We use STANDARD 100 by OEKO-TEX® certification on products tested in an independent laboratory against a list of more than 400 harmful substances, including PFAS. This pack includes four long sleeve Onesies® bodysuits.