Will it fit a 15-inch laptop?

The padded laptop compartment sits in an 18 x 11.5-inch body, so most 15-inch laptops fit with room to spare. Measure your laptop's width against the 11.5-inch height before buying.

Is the PVC shell waterproof?

PVC resists splashes and wipes clean, but the zippers and seams are not sealed. It handles rain showers, not submersion.

Does it fit under an airplane seat?

At 18 x 6 x 11.5 inches it is close to a personal-item size, and the slim depth helps. The slide-through sleeve also lets you stack it on a carry-on handle.

How does it compare with a nylon backpack?

The PVC shell is stiffer, heavier and easier to wipe clean; nylon packs down smaller and breathes better. Organization here is stronger than on most plain daypacks.

What pockets does it have?

A front zipper pocket, side pockets, a zippered stash pocket, a velour sunglass compartment and a mesh organizer pocket inside, plus the laptop compartment.