First came the Fjällräven Keb trousers. Tough, rugged, good looking – we liked them a lot. In fact, they won the ‘Best in Test’ award in our ‘Tough Mountain Trousers’ review. But if the Kebs have; flaw, it's that their robustness is perhaps at the expense of flexibility, making them less suitable for more agile mountain activities. So, Fjällráven created the Keb Agile Trousers. Tike the original Kebs, these are highly featured, with pockets, vents, adjustment at the ankles, and G-1000 reinforcements for extra durability in high-wear areas, but their stretchier fabric makes them lighter and less restrictive. And like the original Kebs, we liked these a lot too. In fact, they won ‘Best in Test’ in our most recent ‘Hiking Trousers’ review. This gave Fjällräven an ideal pair of…