Daft as it might seem, the design and construction of the looms used to make it were considered secret. Letuern recived his first patent on the machinery in 1911. Think of how many things now have webbing straps, belts etc. It was at the time a licence to print money. It also gave the Tommy a marked advantage over the opposition, it was hard wearing durable, not prone to splitting cracking like leather, wasn't sensitive to temprature and was comfortable to wear. The design also allowed better weight distribution so the soldier could carry more , march futher and be in better condition to fight. It also introduced flexibility, you could mix and match standard size pouches to fit mission parameters. All now taken for granted in PLCE equipment. I would say that the Britsh soldier just prior to 1914 was the best equipped they have ever been.
A modern style uniform, moddeled on Gentelemens sporting attire, gave fredom of movement, wool still has a lot going for it over artifical fabrics, the best bolt action battle rifle ever produced, and highly trained soldier's to use it. And of course a world beating set of equipment.