The long sleeve zip rash guard shirt provides all-day, UPF 50+ sun protection without having to apply sunscreen to baby's delicate skin. The stretchy, quick-dry material, and flat-locked seams are comfortable and allow baby to move freely and play actively in and out of the water. The rash guard shirt also helps keep baby warm during first swim lessons in the pool and the half-zip front zipper allows for easy on and off. Parents love the variety of bright, fun colors that coordinate with I play. swim wear & sun wear!