Yes, you can definitely swim in a swim shirt!
Swim shirts are specifically designed for activities in the water. They're made to be comfortable and allow you to move freely while swimming. Unlike rash guards which are often skin-tight and geared towards performance, swim shirts have a looser fit, prioritizing comfort. Whether you choose a long-sleeve or short-sleeve swim shirt, it's perfectly suitable for swimming. They provide sun protection and can enhance your experience in the water.