Our molle ridden Mission Bottle Sling is designed to carry any Grayl Purifier Bottle and can handle most water bottles up to 40oz. Dual cinch top closures keep your bottle secure while on the move. Fully adjustable for left/right or front/back and it has multiple shoulder strap clip-in points to adjust the way your bottles lies on your back or front-side. The large full zip front pocket is designed for a smartphone or other essentials. Sidewalls are molle equipped to attach and carry smaller pouches.