Nonetz's UPF 50+ kid's swim shirts are thoughtfully designed to prevent skin irritation. They feature a skin safe zipper to provide more control over the clingy fit of traditional rash guards. The zipper is fully covered, so it won't pinch or rub the skin. The texture friendly rubber zipper pull ensures no sharp edges anywhere. All seams are on the outside as each stitch is a point of irritation. By using ECONYL® regenerated nylon, they’re able to turn a waste problem into high quality swimwear.