Marc by Marc Jacobs http://www.out.com/sites/out.com/files/imagecache/slide-image-white/MarcbyMarcJacobs.jpg 33925

2 Pock & Biggie Leather-Trimmed and Waxed Twill Backpack, $330, by Marc by Marc Jacobs, at MrPorter.com.

"2 Pock & Biggie," geddit?

WANT Les Essentiels de la Vie http://www.out.com/sites/out.com/files/imagecache/slide-image-white/WANTLesEssentiels.jpg 33924

Checker & Cognac Kastrup Backpack, $525, by WANT Les Essentiels de la Vie, at WantEssentiels.com.

With an internal laptop pocket, a keychain, and a zippered "privacy pocket" conceived for easy storage, a masterpiece of practicality from the Peart brothers' booming label.

Louis Vuitton http://www.out.com/sites/out.com/files/imagecache/slide-image-white/LouisVuitton_0.jpg 33923

Runner D. Ebene Backpack, $2,440, by Louis Vuitton, at select Louis Vuitton stores; LouisVuitton.com.

Vuitton's new line of backpacks is pre-launching exclusively in the US on August 15. The new models combine utility and luxury, with internal sleeves for laptops and tablets and the iconic "damier" monogram.

Calvin Klein Collection http://www.out.com/sites/out.com/files/imagecache/slide-image-white/CalvinKleinCollection.jpg 33922

Leather Backpack, $2,495, by Calvin Klein Collection, at select Calvin Klein stores; CalvinKlein.com.

Fresh off the runway, this olive green leather backpack shines by its simplicity and elegant design, which includes two side pockets.

Dior Homme http://www.out.com/sites/out.com/files/imagecache/slide-image-white/DiorHomme_0.jpg 33921

Soft Indigo Grained Calfskin Leather Backpack, $3,400, by Dior Homme, at select Dior Homme boutiques, Dior.com.

Minimalist beauty in its purest form, in a stunning shade of light blue calfksin leather.

2 Pock & Biggie Leather-Trimmed and Waxed Twill Backpack, $330, by Marc by Marc Jacobs, at MrPorter.com.

"2 Pock & Biggie," geddit?