I saw this wind sock while at Disney World and found out the alternating stripes of high-visibility orange and white were initially used to help estimate wind speed, with each stripe adding 3 knots (5.6 km/h; 3.5 mph) to the estimated speed. However, some circular frame mountings cause windsocks to be held open at one end, indicating a velocity of 3 knots even when stripes are not present. A fully extended windsock suggests a wind speed of 15 knots (28 km/h; 17 mph) or greater.