Very comfortable - we didn't want a tight fit and after reading a few reviews, decided to size up (thank you for those recommendations). The waistband on the 2T pants is enough to hold up the pants for a skinny waist-ed 16 month old and the shirt is nice and loose - right type of comfort without being too loose. The quality is really stellar and they feel very soft - seems long lasting as well given that we've washed it multiple times a week for the last 3 months and they still look good. Definitely like these over the standard carters we pick up.