REVIEW: Cotopaxi Luzon Del Dia 18L Daypack - Going Awesome 。Cotopaxi Luzon 18L Daypack - Del Día Pre-owned in good condition. Description The 18L Luzon Backpack is your easy-going and spontaneous adventure companion. Featuring a hardy yet lightweight ripstop nylon shell and ultralight, mesh shoulder straps, the pack is durable and extra comfy to carry. Thanks to its roomy main compartment, it can fit just about anything. Features Large main compartment Top drawstring closure Front zippered pocket Ultralight mesh shoulder straps Internal hydration sleeve One-of-a-kind Del Día Specs 100% deadstock nylon & polyester 18L (609oz) 51 x 34 x 12cm (20 x 11.25 x 5.1in) 300g (.66lbs)