Skydog Rainbow Butterfly Kite Sky Dogs Butterflies are exceptionally good fliers, especially in strong, gusty winds. Deeply bowed, they have 17-ft. long tails and are super stable. Ripstop nylon with fiberglass spars. 4&#39;-0&#34; x 2&#39;-6&#34;. 29&#34; case. Ready to Fly with 300&#39; of 30-lb. line on a hoop. 6 to 25 mph winds.