Osprey Packs Berm 4L Backpack Raven Black, One Size

What Our Gearhead(R) Experts Are Saying:"The Berm 4 hits the sweet spot for quick trail rides. It's just big enough for a 2. 5-liter reservoir, a snack, and a multitool-everything I actually need without the extra weight. The fit is snug, breathable, and stable even when the trail gets rough."The Berm 4L Backpack is built for riders who want reliable hydration and lightweight storage on every ride. Outfitted with a 2. 5-liter Hydraulics LS reservoir and a magnetic bite valve, this compact bike pack keeps water easily accessible without slowing your flow. A small zippered pocket organizes essentials, and reflective details enhance visibility when daylight fades. The AirScape backpanel and ventilated harness combine to deliver cool, breathable comfort from first climb to final descent. Designed with a unisex fit that accommodates a range of body types, the Berm 4L blends trail-ready function with a sleek, low-profile silhouette. Made with bluesign-approved, 100% recycled materials and a PFAS-free DWR finish, it's built with sustainability and performance in mind.