Rugged, versatile carry-on travel backpack A rugged, expandable, and brilliantly accessible carry-on travel backpack driven by a simple truth: No Two Trips The Same. Features top, side, front and rear access via weatherproof #8 and #10 UltraZips, which can withstand decades of use thanks to their proprietary abrasion-resistant thread. Meets international carry-on size requirements, but expands to be a 45L gear-hauler and collapses to be a 35L day bag, making it unmatched for 1-bag travel. Quick-access pockets for keys, glasses, passport, etc. Hugely expandable side pockets for water bottles, tripods, and more. Padded laptop + tablet sleeves. Main cavity is divisible into 2 compartments via a zippered mesh sleeve. Tuck-away shoulder straps and hip belt. 360-degree grab handles. Cleverly concealed external carry straps. All packed within a sleek, weatherproof 100% recycled 400D nylon canvas shell with 900D bottom liner. Fair Trade Certified and 100% carbon neutral. Works seamlessly with Peak Design Packing Cubes, Camera Cubes, and Pouches, sold separately. For similar features in a smaller bag, check out the 30L Travel Backpack. Make It A Camera Bag Throw a Peak Design Camera Cube into your Travel Backpack and instantly turn it into the most versatile and capable travel camera bag on the planet. Both sizes fit up to a Large Camera Cube and provide convenient rear access. The 45L also provides dual side access, so you can grab your camera without taking the bag off. Access & expansion. The bag offers multiple access points including rear access via a burly #10 UltraZip, dual side access, and a front zip panel for additional storage and organization. Expansion zips allow for fitting more or compressing your load, and a soft-lined zippered top pocket is perfect for keys, glasses, and passports. Internal & external organization. Internally, the bag features padded, dedicated laptop and tablet sleeves, as well as clip-in points for Peak Design Camera Cubes. Externally, it includes hugely expandable side pockets for water bottles and tripods, plus external carry straps that stow beneath a magnetic flap. Travel & security features. Approved for international carry-on, the bag includes a luggage pass-through for roller bag carry and a protected luggage tag holder. It is equipped with theft-deterrent zipper pulls and designed to fit Peak Design Packing and Camera Cubes (fit 3 units with space for more). Comfort & carrying options. Padded shoulder and waist straps stow under magnetic flaps for worry-free bag-checking, with axial strap attachments providing all-day comfort for all body types. The bag also includes a stowable sternum strap and 360-degree grab handles for versatile carrying options. Material & durability. Constructed from a weatherproof, 100% recycled 400D nylon canvas shell with a rugged 900D waterproof bottom liner, the bag features ultralight padded foam for security and structure around the entire bag. The high-visibility grey interior makes it easy to find items inside. Sustainability. The bag is Fair Trade Certified and 100% carbon neutral, reflecting a commitment to ethical manufacturing and environmental responsibility. It comes with a lifetime guarantee, ensuring peace of mind for your investment. Features: International carry-on approved Rear access via burly #10 UltraZip Dual side access via burly #10 UltraZips Front zip panel for additional access, storage, & organization Soft-lined zippered top pocket for keys, glasses, passport, etc. Expansion zips for fitting more or compressing your load Padded shoulder & waist straps stow under magnetic flaps for worry-free bag-checking Axial strap attachments provide all-day comfort for all body types Stowable sternum strap 360-degree grab handles External carry straps stow beneath a magnetic flap Hugely expandable side pockets for water bottles, tripods, more Padded, dedicated laptop and tablet sleeves Theft-deterrent zipper pulls Protected luggage tag holder Luggage pass-through for roller bag carry Weatherproof 100% recycled 400D nylon canvas shell High-visibility grey interior Rugged 900D waterproof bottom liner Clip-in points for Peak Design Camera Cubes Ultralight padded foam provides security and structure around entire bag Designed to fit Peak Design Packing/Camera Cubes (fit 3 units + space for more) Fair Trade Certified and 100% carbon neutral Lifetime guarantee Capacity: 35L Standard (max carry-on)30L Compressed45L Expanded Fits: Peak Design Packing Packing/Camera Cubes:3 units + bonus space Laptop/Tablet Carry:Laptop Carry: Fits a 16" laptopTablet Carry: Fits a 10" tablet Dimensions: External Dimensions:Standard: 22 x 13 x 9.5"Compressed: 22 x 13 x 9.5" (compression only happens at the top of the bag. 6" at top when compressed)Expanded: 22 x 13 x 11" Internal Dimensions:Standard: 21 x 13 x 6.5"Compressed: 21 x 13 x 5.5"Expanded: 21 x 13 x 7.5" Laptop/Tablet:Laptop Carry: 16 x 11 x 1"Tablet Carry: 9.5 x 7.5 x 0.6" Weight: 4.5 lbs Materials: Weatherproof 100% recycled 400D nylon Versa Shell external fabric. DWR impregnated and double poly coated for water resistance. Sage fabric is Bluesign approved. 900D waterproof bottom liner High-visibility grey nylon interior Hardware is anodized aluminum and glass-reinforced nylon Super-durable UltraZips with abrasion-resistant UHMPE thread Leather accents (Sage only) are Gold Certified by the Leather Working Group Hypalon zip pulls and reinforced stress points FAQ: Functional differences vs. 30L: More access points: rear, side, and front access zips Dividable main volume: internal divider sleeve zips up to creates 2 compartments when needed Integrated hip belt: stowable padded hip belt for heavier loads Compressible: compression snaps slim down the profile for use as a day bag Hidden pockets: 2 hidden external zip pockets for cash, passport, etc. Room for more: room for 3 units of PD cubes, plus bonus space for pouches, jackets, shoes, etc. More photo-capable: fits camera cubes in un-expanded state, and allows quick side access to cameras and lenses Manufacturer SKU: BTR-45-SG-2 In The Box: Peak Design Travel 45L Backpack - Sage2x Cord Hook External Carry Straps1x Stowable Sternum StrapLimited Lifetime Manufacturer Warranty