Imagine hitting the slopes for the ultimate free ride down the edge of a cliff. Now picture being caught in an avalanche with only a shovel to free you from hundreds of pounds of snow -- the odds don't look too good. The North Face hopes to change all that by integrating an Avalanche Airbag Safety System (ABS) into its tried and true backpacks with the launch of its ABS Patrol 24 Pack and ABS Vest, two new body-worn fixtures that inflate to protect your from falling snow much like the airbags in your car. Add two new fabrics into the mix, FlashDry and Thermoball, and it seems like we've come a long way since the days of working out in our college sweats. We go hands-on with pro snowboarder Xavier de