The titanium Brenthaven Expandable Trek Backpack - Titaniumfrom Brenthaven features a center zipper that acts much like a compression strap. When opened, it provides another compartment for approximately 20% more storage space. The main compartment holds your 15.4" MacBook in a high-density foam-padded cradle system that suspends and protects it from bumps. A touch fastened security tab holds the laptop in place. A zippered front organizer panel with a handy key ring features various pockets for pens, phone, adapters and other small items. A felt-lined quick access pocket is provided for sunglasses or important items. Additionally, there are two side pockets for water bottles. Adjustable bungee cords on the back of the pack provide space to store a sweatshirt or jacket.

Access to the interior is via dual zippers for the main, organizer and expansion compartments. This is a water-resistant ballistic nylon, PVC-free pack with a polyurethane backing. The Expandable Trek is carried by its two contoured, adjustable backpack straps.The sternum strap provides additional stability. A top carry handle is included for quick grab moments.

Fits MacBook up to 15.4"    Expandable for 20% More Storage    High-Density Foam Laptop Cradle    Security Tab Holds Laptop in Place    Front Organzer Panel / Key Ring    Felt-Lined Quick-Access Accessory Pocket    Two Water Bottle Pockets    Ballistic Nylon / High-Density Foam    Contoured, Adjustable Backpack Straps    Top Carry Handle / Sternum Strap

Related Questions and Answers

Q: 1. What is the range of the length adjustment for the sternum strap? .. for example like 4-22 inches ?

A: The sternum strap on the Lowepro Flipside Trek BP 250 AW Backpack (Gray/Dark Green) has a lenght of 3.5 -12.5 inches.

Q: 2. Will this pack hold a canon 5d s with a canon 100-400 attached? I realize it will with the lens unattached.

A: Sorry I returned the bag, wasnt right for me. But it did fit with my 70-200.

Q: 3. Would this bag fit a Canon XA50 camcorder?

A: No, the Lowepro Flipside Trek BP 250 AW Backpack (Gray/Dark Green) is to small for the Canon XA50 camcorder.

Q: 4. What are the measurements for the camera compartment and the upper compartment?

A: Sorry, we are not able to measure the bag. From what information we have, the exterior dimensions are 10 x 6.7 x 17.3 / 25.5 x 17 x 44 cm with what appears to be the camera compartment interior dimensions being 7.9 x 4.7 x 9.1 / 20 x 12 x 23 cm and thus the top should be about 7.9 x 4.7 x 8 / 20 x 12 x 20 cm.

Q: 5. Will the 450 or 350 meet airline carry-on size requirements?

A: The maximum size carry-on bag for most airlines is 45 linear inches (the total of the height, width, and depth of the bag). The Lowepro Flipside Trek BP 450 AW Backpack measures 43 linear inches, so it should meet most airlines requirements for a carry-on. Though, you would want to double check with the airline you will be flying with to see what their requirements are.

Q: 6. Would this bag be OK for a black magic mini ursa? I'm looking for something I can travel with.

A: This will easily handle a built-up URSA Mini and will be very good for transport. One caution, this is only for your own back-packing or traveling in your vehicle. Do not check this bag with the camera in it for an airline trip.

Q: 7. Will a 11 w x 13 h x 2 thick binder fit in front personal items section? Along with a book or two to read?

A: I can barely fit in my ipad2 when loaded with gear. (MK IV - 70-200, 28-70, 50mm, batteries etc) The bag is not very flexible (which is good for protection) so outward expansion is minimal. I can rig the bag up to carry my MacBook when traveling but its very tight.

Q: 8. Would I be able to fit a panasonic hvx200?

A: Yes, this backpack is big enough to accommodate the Panasonic HVX200.

Q: 9. How does a travel tripod fit in/on the bag?

A: I use a MeFoto Backpacker Air, by placing it on the side pocket where you'd usually place a water bottle. Then there's two cinch straps to keep it sturdy and close to the backpack without any swaying or movement. Also there's two identical water bottle pockets so you have the flexibility to place it on either side depending on your balance for that day. Hope that helps..

Q: 10. What is the bag volume in terms of liters?

A: According to Lowepro, the Flipside Trek BP 250 AW has a 10L capacity.