Designed for demanding ultra marathons, the UltrAspire Epic Race Vest is the pack of choice for endurance athletes competing in self supported races across formidable terrain. 25 liters of total storage offers plenty of room for extra layers, protective rain gear, running nutrition, and a three liter hydration reservoir not included. The main compartment offers 11 liters of roomy storage for tossing sweaty layers, bulkier items, and food. Also, there's a front zip essentials pocket for holding your keys, credit cards, and other important items. Excellent support and stability comes courtesy of its wrap around waist belt, Dual Max O2 sternum strap, and vest style shoulder straps. The shoulder straps feature holsters for quickly grabbing the included 550mL UltraFlask water bottles on the run. Plus, there's a variety of smaller, mesh bound pockets that work great for quickly accessing snacks and energy gels on the run, as well as ice axetrekking pole attachments for crossing alpine environments. And for weather protection, the tuck away rain cover keeps the Epic Race Vest from soaking in passing showers and storms.