Waterloo

Yes. A dedicated 15" laptop sleeve sits inside the main compartment, next to a secure zip pocket and two slip pockets, so your computer travels flat against your back instead of loose among your clothes.

25 L is a full travel day: a laptop, a change of clothes, a book and the small things that follow you, with two side pockets and a magnetic front pocket keeping the essentials within reach. For lighter days, the KALINKA leather knapsack is the shorter cut of the same idea.

Yes. The padded shoulder straps take the weight even when the bag is full, and the stress points are reinforced with rivets, so the straps hold where cheaper bags let go first.

The material is water-resistant, not waterproof. It can withstand light rain and splashes, but avoid heavy or prolonged rain and immersion. Protect electronics separately, wipe off moisture and let the bag dry naturally away from direct heat.

For day walks and travel on foot, yes: the drawstring and flap keep the main space closed on the move, and the padded straps carry the load. It has no hip belt or technical harness, so for long mountain days with serious weight it is the wrong tool.

If you count grams, a modern pack such as the Patagonia Black Hole Pack 25 L gives you the same volume in tough recycled fabric for far less weight. The Waterloo is 2.1 kg of full-grain leather empty: it earns marks and patina instead of hiding them, and it looks better at year five than on day one.