These are tough and waterproof waist packs for your essential items. They are made from tough 500D vinyl to withstand all the knocks that you experience on the trail. It is really simple to seal these belt packs, just roll the top down 3 times. We have also added a Velcro strip to make it even easier! A splashproof quick-access pocket is great for cash and phone. An internal zippered pocket gives security for the most important items. The comfortable, breathable mesh padding gives all-day comfort.