This is a small 1L Waistpack made by Brooks who primarily do running accessories. This is what Brooks had on their website about this bag, “Keep all the essentials close at hand in this running waist pack. A bounce-free fit plus weather-resistant fabrics and plenty of secure storage come together for an efficient carrying option for your run commute or adventure.” The strap is made of a stretchy elastic that is in like new condition and feature a strap keeper for strap management. And the bright yellow wings on the bag are small mesh pockets.