Use Body Glide or Monistat Antichafing gel in the morning before you get dressed to prevent it. If you are going during the summer when it's REALLY hot, you may want to carry it to the parks with you to reapply about mid day, although we've never had to. Body Glide is the best thing ever made. It's great between the legs, underarms, under breasts, or belly folds or anywhere else someone might chafe and it's also great at preventing blisters on your feet. Some people also swear by antiperspirant (not deodorant though). Prevention is better than a cure or treatment.