Great daypack if you're looking for something light but not totally shapeless like those fully-collapsible packs.  This is a nice compromise: Easily packable (though not really rollable), very light, and holds its shape due to its sturdier nylon fabric.  Main compartment has 1 zippered pocket and 3 non-zip pockets (for tablet, phone, pens, etc).  Two exterior side pockets have velcro closures but are not form-fitting so some water bottles may not fit.. Thanks to Amazon Prime, I was able to try out the other collapsible packs before finding this one.  Great price too.