AONIJIE UTMB-4L Trail Running Vest 144g Ultralight Backpack with 500ml Bottle Pockets 6.8" Phone Compartment, Pole Mounts

AONIJIE UTMB-4L Mont Blanc Series – Precision Compartmentalization for Race Day Excellence Every second counts on race day. The AONIJIE UTMB-4L Mont Blanc running backpack is engineered with intelligent compartment placement that puts exactly what you need exactly where you need it. At just 144 grams (size L) , this ultralight vest proves that organization doesn't have to weigh you down. Front Compartments – Nutrition & Navigation at Your FingertipsLeft and right 500ml water bottle pockets for balanced hydrationDedicated salt pill and GPS compartments for critical race-day essentialsEnergy gel pockets for quick fueling on the moveSecure zipper compartment that comfortably fits a 6.8-inch mobile phone – no fumbling, no dropsRear System – Expandable Storage for Unsupported SectionsGenerous rear storage compartment for layers, food, or extra gearDual pole bag mounting points (both sides) for hands-free trekking pole carryStrategic placement ensures weight distribution remains balanced The 85% nylon, 15% spandex construction provides the perfect balance of stretch and stability, while the Dynamic Fit ensures zero bounce even at full speed. Available in four precise sizes (S to XL) based on chest circumference. Whether you're chasing a UTMB qualifying time or tackling your first ultra, the UTMB-4L puts everything in its place – so you can focus on the trail ahead.

• Front-Loaded Race Organization – Left/right 500ml bottle pockets, salt pill compartment, GPS slot, energy gel holders, and zippered 6.8" phone pocket – all within arm's reach.
• Dual Trekking Pole Mounting System – Integrated pole bag mounting points on both sides allow secure, hands-free pole carry during steep climbs or fast descents.
• Anatomical Sizing System – Available in 4 sizes (S-XL) with detailed chest measurements ensuring perfect pocket placement and chafe-free fit for all athletes.
• Expanded Rear Storage – Spacious rear compartment provides additional capacity for layers, nutrition, and gear during unsupported sections of long-distance races.
• Ultralight Professional Build – Weighs only 144g (size L) with 85% nylon, 15% spandex construction that delivers bounce-free stability and breathable comfort.