What Our Gearhead(R) Experts Are Saying:"This is the only small pack I trust in a full-on downpour. It fits great right out of the box thanks to the adjustable AirSpeed(TM) suspension, and I love that it doesn't sacrifice comfort or organization for waterproofing."We've always believed that wet weather shouldn't mean staying home. The Downburst 24L Backpack proves that with its category-defining comfort and IPX5-rated waterproof construction. Engineered with bluesign(R) APPROVED recycled nylon materials and RF-welded seams, this pack seals out the storm while staying light and breathable thanks to Osprey's signature AirSpeed(TM) backpanel. The harness system features a ventilated, tensioned mesh back and an injection-molded ladder adjustment for a dialed fit, no matter how fast we're moving or how much we're carrying. We get just enough internal space for the essentials, and quick-access external storage-from oversized hipbelt pockets to trekking pole attachments-keeps us ready for every twist in the trail.