The spi h2o venture series is a unique product because the two 8 ounce bottles that can be placed anywhere on the elastic allowing runners to maximize comfort this running belt is built for durability and can keep up with your longest runs go for a hike run a marathon go mountain biking the venture series will effortlessly keep your water and other essentials right where you need them the belt pocket is big enough to hold the iphone174 6s plus or the samsung galaxy note 5174 as well