Aerios 18 Backpack is an ultralight and durable daypack designed for hiking, built as an ultralight 18L pack with a customisable fit that helps reduce distraction from carrying discomfort on the trail. Product Type: Unisex ultralight daypack Material: Patent-pending interchangeable harness system Weight: 567g 18L capacity for streamlined day-hike carry Ultralight, ultra-strong grid pack fabric sheds light rain and resists drops, drags, and snags Updated with an FC0 DWR finish for a lower footprint For hiking, pair it with a hiking fleece and hiking shoes for warmth and support on the trail. The Aerios 18 Backpack has a patent-pending interchangeable harness system that allows you to finetune your fit before you start your hike, so you won’t spend every step thinking about your pack. The ultralight, ultra-strong grid pack fabric sheds light rain and stands up to all the drops, drags, and snags a pack encounters on the trail. What's been updated: Updated with a FC0 DWR finish for a lower footprint. Need a different size? Try the larger Aerios 35 Backpack.