Safety rules: Must measure a minimum of (1.07 m) 42'' tall. Children under (1.22 m) 48'' must wear a life jacket and be accompanied by an adult. Maximum weight per inner tube is (181 kg) 400 lb. Riders must be in a seated position, facing forward and holding the handles firmly at all time. Glasses with straps are permitted. Not recommended for pregnant women, people with heart conditions, back or neck problems or people who have claustrophobia or are afraid of heights.