My 1 year old son wears footed sleepers and I wanted a soft undershirt that was not a onesie.  The cotton is high quality and no more trying to snap on a onesie as well as get my son in a zipped or snap sleeper. Short sleeves t-shirts seems hard to find so I'm glad I ran into this Under the Nile brand.  This was especially helpful in the winter months when you just don't want to put your little one down in just a sleeper.