Vaude Triset 25 + 4

This daysack from Vaude has a long back, which positions the shoulder straps in exactly the right place, while allowing the well-padded waist belt to hug your hips perfectly. The Aeroflex concave back system keeps you cool and dry, and the shoulder straps are extremely comfortable. Good range of adjustment on the chest strap, too. The tall, slim profile does make it more difficult to access the contents than with many of the others, but this is more than compensated for by its stability, which is further enhanced by compression straps. The side pockets are bellowed, and therefore neat when empty, and the shock cord on the front is useful for storing wet jackets.