Nothing beats the original. The Transition Bag sets the bar for a race day pack that holds everything you need without feeling like you're going camping for the weekend. It features a large insulated bottom compartment that separates your wet gear from the large top load section. Two expandable side water bottle holders and four smaller zipped pockets for your essential items. Fully loaded this bag fits all airline carry on requirements. Top compartment is 32L / Bottom wetsuit compartment is 12L.