It’s not often that you come across a product that’s design has solved every issue that you can think of before you can address it. The POC Spine VPD Hydration Pack is the Swiss army knife of small-size hydration packs. The Spine VPD has a bunch of conveniently organized pockets for stashing clothes, phones, ipods, snacks, etc. The VPD is an effective feature that provides spinal support and protection in the event of a seriously fall. I would confidently recommend this to any mountain biker, road biker, hiker, skier, or snowboarder.