What Our Gearhead® Experts Are Saying: "I like this pack for big days where a running vest isn’t quite enough. It hugs close like a vest, barely bounces, and still carries layers, food, and water comfortably. For long trail runs or fast hikes, it strikes a rare balance between capacity and stability." We trust the Slope Runner 18L Exploration Pack when our plans stretch into long miles and variable terrain. Patagonia designed this pack to blur the line between running vest and small backpack, giving us a secure, body-hugging fit that stays stable even when the pace picks up. It’s the kind of carry system that lets us focus on the trail instead of adjusting straps. The unstructured main compartment swallows extra layers and essentials, while multiple chest pockets keep fuel and small items right where we want them. Breathable mesh panels help manage airflow, and dual sternum straps fine-tune the fit for comfort over hours of movement. With included soft flasks and external carry options for tools, this pack is built for endurance missions that demand efficiency and reliability.