Fit Guide Adjustable snap closure. One size fits all. Details 60% Cotton / 40% Polyester / 100% Polyester mesh back Breathable mesh back. Hand wash. Hang dry. Imported. The Florence North Shore Lifeguard Association Twill Trucker Hat honors the men & women who stand guard over Oahu’s North Shore. Comprised of some the most renowned watermen & women on earth, the NSLA rescues people in the heaviest water imaginable. A portion of proceeds from this collection benefit the NSLA.