If you are planning on doing some serious walking, trekking or hiking whilst away then this range of rucksacks will fit the bill. They are more slim in shape compared to travel packs which minimises the possibility of snagging and puts the weight more in line with your spine. They are also top loading which gives a more weatherproof pack from the affects of rain, snow and sand. They also tend to use lighter denier materials with gives an overall lighter pack.