Is this set good for hot summer days?

Yes. The top is sleeveless and the bottoms are shorts, so it is built for warm weather. It gives little sun protection, so plan a hat or shade for long outings.

What does OEKO-TEX certification mean here?

It means the fabric has been tested for harmful substances by an independent body. That is a meaningful check for clothing worn directly against a baby's skin.

Does it work for a newborn?

Carter's lists it for newborns and young babies. The two-piece design is easy to put on and take off for changes, though a sleeveless top may need a layer in air conditioning.

Can the top and shorts be worn separately?

Yes. Both pieces are plain separates, so the top pairs with other shorts and the shorts with other tops. The matching print is optional.

How should I wash it?

Follow the care label on the garment. Baby knits like this generally do best in a gentle machine wash and low tumble or line dry to keep the print and shape.