Sea Otter Nylon Kite 50″ by Brainstorm. Sea Life Otter Nylon Kite, 50″ Handle and line included Ready to fly! Sky tails included. Made from ripstop nylon fabric. Line weight: 25 lb./Line length: 125 ft. Wind rating 7-18 mph Ages 8+. Nylon fabric kites are more durable than any plastic kite. They are fun to fly and easy to assemble.