Osprey Seral 4 Lumbar Pack - One Size, Black industry-nine One full-size bottle cage mount

One full-size bottle cage mount fits inside the front triangle for all frame sizes

Gusset keeps the family jewels nice and comfortable

Carbon-tuned lay-up crank design provides extreme stiffness and light weight

Intense study of chain and chainring wear patterns led to the radical tooth profile that lasts longer

and offers 80% more sidewall protection vs traditional single-ply tires

Osprey Seral 4 Lumbar Pack - One Size, Black industry-nine One full-size bottle cage mountThe Osprey Seral lumbar pack is perfect for the minimalist looking for something other than a traditional over the shoulder pack. The Seral features a dedicated hydration compartment that stores an included 1. 5L lumbar reservoir and compresses for stable carry. Dedicated hose magnet attaches the bite valve for easy access. Easily accessible zippered main compartment with internal tool organization Dual zippered hip belt pockets Front panel bungee