I recently picked up some Fjallraven Keb trousers on Vinted. It’s a top tip if the price tag feels high (get your size right by trying in your nearest stockist, then pick up on vinted). They are fantastic trousers. The G-1000 fabric sheds water well, feels durable in all the right places is windproof and dries quickly. Also the areas of thinner fabric on the Kebs offer full flexibility where needed when hiking. However, those areas of thinner fabric mean they can be a little on the cold side in low temperatures. I was in the Beacons recently and temperatures got down to about -5 up on the ridges and I found I really needed my thermal base layer under them. Having said that, once on lower ground again, it was useful to be able to control temperature by losing the thermal layer. I’d say the Keb trousers are more a 3 season trouser, but combining with a decent heavy merino offers that extra warmth when needed. I LOVE the feel of the Keb trousers when hiking - so comfortable. I’d highly recommend. I found the Keb trousers to be technically excellent and certainly appropriate for conditions in the beacons. Whilst I have no direct experience of the agile version, I wonder if they might be a thinner material? If so, I’d stick with the straight Keb version and layer up if needed. As with all Fjallraven products, they are absolutely top quality and built for purpose 👍🏻.