SplashSak Dipper Waterproof Travel Pouch by Loksak has an outer bag comes with an adjustable, nylon waist belt to strap the bag around your waist for extra security.  The nylon belt has a side release contour buckle for a reliable fit.  You can attach the SplashSak around your waist under your clothes to carry valuables discreetly or clasp the belt on the inside of your backpack or luggage so you always know the location of your SplashSak.