Keep the kids warm without breaking the bank. 3mm black/blue neoprene back zip suit will keep them from getting sunburnt also.
Keep in mind a little growing room is always good!
All seams have flatstitches for a more comfortable fit. The neck, wrist and ankle openings are smooth skin wrapped for a better seal.
Choose a suit, just a bit on the large side to allow for growing and any uncertanties of fit :)