My grandson is almost 6 months and we are at the pool almost every day. This suit covers his entire body and he has never gotten sun exposure or a rash. The full zipper is a game changer and I will never buy anything except Swim Zip for my grandson. As an added bonus, the prints are adorable. My grandson has 4 bodysuits, 1 rash guard shirt, 1 zipper rash guard and a pair of swim trunks.