Osprey Savu 5 Lumbar Pack - One Size BlackOsprey Savu 5 Lumbar Pack One Size Black. Made to suit the mountain biking minimalist the Savu 5 liter waist pack is ideal for quick laps on local singletrack or gravel trails. Two rigid pockets make it easy to pull and replace water bottles as you pedal while an angled hipbelt and compression straps provide max stability over every trail. Want to go even more svelte? Each water bottle sleeve can tuck away when not needed to provide a streamlined