Airflo Nylamtium is a durable, water resistant 6oz 2-ply Supplex nylon, lightweight and fast drying. Each stitch is lockstitched, and the polycotton thread swells when wet, sealing the needle holes against rain. LTM5 Medium Airflow Hat Features Available in Olive with green underbrim or Khaki with olive underbrim. Airflo hats incorporate mesh in the crown for extra breathability in hot conditions. Higher crown for ventilation. Smart \"\"town and country\"\" unisex styling. Certified UPF 50+, the highest sun protection rating given to hats and clothing. A non-absorbent foam liner in the crown adds buoyancy. Machine or hand washable, air dries in a few hours. Adjustable, tuckaway fore \'n\' aft wind cord keeps the hat on. Designed to fit low and loose, held on by gravity or the windcords, not painful pressure. Crushable and stackable. Guaranteed for life: Tilley will replace the hat if it ever wears out, falls apart, shrinks or mildews. Tilley\'s Ref. MPN: LTM5Colour: Blue Spruce, Blue/Grey, Khaki, Light Stone, Midnight Navy, Olive, Sage Green and Rock FaceSizes: 56cm, 57cm, 58cm, 59cm, 60cm, 61cm, 62cmPM Ref. 831554