The Viper and Verve series delivers the outstanding functionality of our Hydraulics™ Reservoir in a versatile, light, high-performance package. Upgrades to the line for 2013 include a front shove-it pocket that increases the range of use for the packs and fresh vibrant colors and styling. Distinct sizing and design for men and women ensures that the Viper and Verve will provide optimal fit and performance for any activity.