Vaenait Baby pajamas are one of my favorite Amazon buys. The brand sells adorable PJ sets for kids—anything from the softest bamboo summer sets to cute ribbed long sleeve sets for winter. They just released this new style in 20 different colors and I had to grab a few sets for my kids! The brand runs a bit small so I would size up. There is also a 10% off coupon right now!
Linked here (commissionable).