6. Bike Mount 8. Belt Clip 7. Backpack Mount Use the Bike Mount to attach the Outdoor case to the handlebars of your bicycle. There are 3 rubber spacers to choose from depending on the diameter of handlebars your bike features. Use the Backpack Mount to attach the Outdoor case to the shoulder strap of any backpack or hydration pack. The Backpack Mount is a neoprene sleeve, which features side holes that allow the sternum strap to feed through, adding stability during use.