Osprey Exos
As is often the case with Osprey backpacks and rucksacks, the 'medium' bags in the series are often the most popular within that series. Take the Osprey Exos series, for example. The Osprey Exos 48 offers all the same benefits that you will find in the Osprey Exos 38 or Osprey Exos 58 bags, but offers the perfect balance of space and compactness, whereas the Exos 58 is perhaps more suited for longer journeys, and the Exos 38 more suitable for shorter trips or weekends away. Whatever sort of trip you're going on, one of the three Exos models will be perfect for it.