To ride the zipline on Royal Caribbean's Symphony of the Seas, guests must meet specific physical and safety requirements. First, there is a minimum height requirement of 52 inches (132 cm). Regarding weight, riders must weigh a minimum of 75 lbs (34 kg) and a maximum of 275 lbs (125 kg). These limits are strictly enforced with a scale at the entrance to ensure the harness fits properly and the braking system functions correctly. Furthermore, "proper attire" is mandatory: you must wear closed-toe shoes with a secure heel (no flip-flops, Crocs, or sandals), and your clothing must be dry (no wet bathing suits). Long hair should be tied back, and loose jewelry or hanging items must be removed. From a health perspective, the ride is not recommended for those with heart, back, or neck problems, or for expectant mothers. Because the zipline carries you ten decks above the "Boardwalk" neighborhood, guests should also be comfortable with heights. In 2026, it is also standard to sign a digital "activity waiver" via the Royal Caribbean app before you can participate in any of the ship's high-thrill activities.