After reading all the good things about merino on here a year or two back, I caved-in and bought one just before the mass opinion changed and they were declared as a bit crap (as I found out for myself). I tried older Lifa, worked ok, but didn’t age too well. Moved on to Patagonia, which I felt was an improvement, tried merino and discovered all of it’s good/bad points, and have settled on a synthetic from The Mountain Warehouse, called Talus Parallel,as the best i’ve used. As a bonus, it’s also the cheapest too, about £8 last time I was there.