Sierra Designs Prophecy 35 Pack The Sierra Designs Prophecy 35 Pack is an easy-to-carry backpack that you can take along on all your outdoor activities. This product has compression straps so that you can pack more into it, and still not feel the weight as the air in the backpack is pushed out, making your load feel considerably lighter. Thanks to the water bottle pockets, you can store plenty of fluids, to keep yourself hydrated. It has a large front pocket that will assist with your organization, here you can pack your items without worrying about misplacing them. The S-curve shoulder straps give the backpack a snug fit, so that you can walk easily through any kind of terrain with the bag strapped firmly to your back. Since it comes in medium and large, you can choose the size that fits you the best. The Sierra Designs Prophecy 35 Pack is the ideal choice on those long hikes and trekking adventures.