Trailhead Supply’s vinyl coated polyester Top Packs come in both square and H – Pack styles. Both styles are built using ultra strong 22 ounce vinyl coated polyester fabric. This is the same fabric used in the manufacturing of oil booms and special ordered heavy duty truck tarps. Trailhead Supply’s top packs measures a full 33” long x 28” wide x 9 ½” high Giving you that extra cargo space you need on that next back country adventure. A full length top zipper running across the complete top for easy loading. This top zipper is covered and protected by a 3 inch storm flap helping protect your belongings from everything mother nature can throw at you. Two 1 ½” inch nylon web reinforcements with dee rings and four one inch nylon web tie down straps with nickel plated hardware for securing your top pack. Comes in white and trimmed in Black nylon webbing. Proudly made in the USA.