Aye that's the one they recommended I buy. I tried on a fair few, they were pretty patient with me.
I didn't know yomping was a Marines term - then again, as a kid I was with the 17/21 Lancers (don't exist no more) and as an adult instructor I was with the Welsh Guards, and training with them was frankly terrifying (they're infantry which don't have women in, so some of them had a few issues with women on their patch. This was a few years ago, but the mess had a line painted on the floor about a metre from the bar and women could not cross it to buy their own drinks. After spending the whole day keeping up, not being able to buy a drink, was pretty archaic! And you couldn't have a pint! Only halves!!!)