Exos Pro 55 S/M Backpack Size:One Size All Weather cases defend your

All Weather cases defend your firearms from damage and the elements

rechargeable lithium-ion battery

Battery Count/Size: 6 or 3 AA

10% spandex with FlashDry-XD™ and non-PFC durable water-repellent (non-PFC DWR) finish

187 g/m² 92% polyester

Exos Pro 55 S/M Backpack Size:One Size All Weather cases defend yourNearly a pound lighter than the Exos 58 and featuring a more fine tuned adjustment system, the 55 liter Exos Pro is the most comfortable ultralight thru hike backpack in its weight class. A highly ventilated AirSpeed backpanel supports light loads with ease while maintaining maximum airflow across your back, making it an ideal pack for your most long distance endeavors on the Appalachian Trail, Pacific Crest Trail and beyond.