Although rucksacks generally connote a military style or a backpack relatively large in size, and generally used for long hikes and overnight camping. In any case, a piece of gear to allow you to carry a bunch of stuff on your back. Ideal for daily activities like school or shopping, they're a top-notch way to keep your hands free, and you on the move. And they don't look as if they came from a military surplus store.
From LL Bean, this Maine Guide Leather Rucksack ($249, plus free shipping). It's weather-resistant, full-grain leather that will age beautifully. This roomy backpack will hold your daily needs while allowing for easy access through the top flap. A pair of exterior pockets, quick-release buckles, nylon lining, shoulder straps and carry handle seal the deal. And, it will fit in the overhead compartment for travel. Nice.
For casual use while on your way to the office or gym, this Filson Otter Green Rucksack ($265). Also available in Tan, this 100% cotton twill backpack is lightweight and comfortable with top-quality bridle leather on the shoulder straps, carry handle, and the two-way zipper pulls. It sports a pair of expandable bellows pockets, with snap flaps, on the exterior, and an open rear pocket for magazines, maps, and such.
There are more than 900 cubic inches of internal storage in this Fjallraven No.21 Rucksack ($170); made with waxed G1000 fabric for water-resistance, the backpack features front and side exterior pockets, a bottom seat pad with a padded laptop sleeve that will accommodate a 13" laptop, an interior water bottle sleeve, and durable, nonstick YKK zippers. Ideal for the office, a day trip, or just kicking around town.