Safety rules: Must measure a minimum of (1.02 m) 40'' tall. Maximum weight is (136 kg) 300 lb. Riders must either lie on their back or in a sitting position feet first. Glasses, t-shirts, pants, burkinis or any additional clothing are strictly prohibited. Swim wear with zippers, buckles, rivets or metal ornaments are not permitted. Not recommended for pregnant women, people with heart conditions or back or neck problems.