The Apex Pro Run Vest is designed based on the experiences gathered from the Cocodona 250 ultramarathon. The backpack comes with two 500ml soft flasks, each in its own pocket. Additionally, there is a compartment for a max. 2-liter hydration bladder (to be purchased separately), with the manufacturer stating that the 1.5-liter Camelbak Crux (also sold separately) is the best choice. In this model, Camelbak, the true pioneer of hydration backpacks, has significantly focused on carrying comfort. The 11-liter backpack can hold, besides nutrition and drinks, spare clothes, a small first aid kit, a space blanket, phone, and other essentials. - Two chest straps - Lightweight but durable nylon fabric - Water-repellent small items pocket - Dedicated phone pocket - Safety whistle - Key clip - Detachable pouch for collapsible running poles - Reflective details - "Tube trap" holders for the hose of a separately purchased hydration bladder - Flexible "Overflow" pockets allow for quick packing of