Lightweight and Versatile Design: Built to adapt to any outdoor adventure with exceptional comfort and functionality. Adjustable Harness System: Includes vest-style straps and a stowable hip belt for maximum comfort across all body types. Durable and Eco-Friendly: Made with weather-resistant Terra Shell™ fabric, abrasion-proof, Bluesign-approved, and PFAS-free. Optional Rain Fly*: Provides full waterproof protection for extreme conditions. 10.5L Expandable Roll-Top: Ultra Cinch™ roll-top offers lightning-fast access and extra capacity. Rear Access Panel: Ideal for packing and carrying camera gear, compatible with Peak Design Camera Cubes*. 5 External Flex Pockets™: Provide quick access to essentials like water bottles, jackets, and tripods while maintaining a sleek profile. Customizable External Attachments: Features Gear Loops, Cord Rails™, and Cord Hooks™ for endless carry options. Compatible with Peak Design Packing Tools*: Optimize organization for any gear setup. Eco-Friendly Construction: Fair Trade Certified and 100% carbon neutral. Capacity: Roll-top down: 34.5L Roll-top extended: 45L External Dimensions: Roll-top down: 56cm x 31cm x 17cm (22.05" x 12.20" x 6.69") Roll-top extended: 78cm x 31cm x 17cm (30.71" x 12.20" x 6.69") Internal Dimensions: Roll-top down: 55.5cm x 30.5cm x 16.5cm (21.85" x 12.01" x 6.50") Roll-top extended: 77.5cm x 30.5cm x 16.5cm (30.51" x 12.01" x 6.50") Hydration/Laptop Carry: 1x internal hydtration sleeve 1x external hydration sleeve (center Flex Pocket™) Internal sleeve fits up to 16" MacBook Pro Weight: Without hip belt: 1.55kgs (3.42 lbs) With hip belt: 1.8kgs (3.97 lbs) No two outdoor trips are the same—your gear, environment, and needs are always changing—and the Peak Design Outdoor Backpack 45L is a lightweight, internally framed backpack designed to handle it all without forcing you to make sacrifices.