The right trail running hydration pack disappears on your back. Orange Mud's trail lineup is built to stop the mid-stride vest-slap that wrecks your rhythm once the terrain gets technical, bladder or bottle, your call. 

The Gear Vest is our no-bounce trail running vest for fast days under three hours, running a 1L bladder hugged close to your spine so it stays locked in no matter how rough the singletrack gets. Need more? The Endurance Pack steps up to a 2L trail running vest setup for longer efforts and ultra-distance days. Going further still, the Adventure Pack 20L is built for multi-hour missions and fastpacking, when you're genuinely out there, carrying your whole day on your back. 

Every gear vest trail running hydration system here uses Orange Mud's vertical, close-to-body placement, so weight rides high and stays put, no sloshing, no bounce, no distraction. It also makes a solid OCR hydration vest for obstacle racers who need gear locked down tight through mud, water, and walls. 

Picking a trail running hydration vest comes down to three things: how long you're out, how much nutrition you need to carry, and how much bounce you can tolerate at hour four. Short, fast loops want minimal weight and a tight, race-fit profile; that's the Gear Vest. Longer days and ultramarathon hydration vest needs call for more capacity and more storage, which is where the Endurance Pack and Adventure Pack 20L take over.

Storage matters as much as water capacity. Every vest in this collection is built with an easy-access nutrition layout, front-facing pockets sized for gels, bars, and soft flasks so you're not stopping or digging through a pack mid-stride. Sizing runs true across men's and women's frames, with a women's-specific fit available on select styles for runners who've struggled with gapping or chafing in unisex vests.