Polyester Large 20" x 20" size Bright Orange for Signalling Survival Information Printed Directly on Bandana Must Have For All Campers and Hikers For Easy To Understand Information Basic survival techniques explained on a convenient bandana. Includes how to make a still to get water, build an emergency shelter, navigate using the sun or stars, start a fire, tie useful knots, identify sources of food and signal for help. Bright orange color makes for a visible signaling device.