I too am using the Monarch Monro gaiters and really like them. As with any zip gaiters it is a tiny fiddle to put them on but once on they are great. Mine have only done a limited number of days so far but have been out in snow, Heather hillsides, forestry and so on and while they haven't enough use for a review first impressions are very positive.
Ah, stalking in bramble? If it's silent and strong you're after, and thornproof, then you'd best get some decent hide and make or have made a proper leather pair, not from that weak Spanish hide either...
We have had the same John Deer gaiter for the last 12yrs and its still going strong. It's driven at least 3 hours a day (except Christmas Day and New Years Day) and we even tow other equipment with it. and it's quite
Was going to recommend Hamish's Black Islanders also, but op wanted quiet - and for using in brambles - thornproof sure, but hard to find suitable material other than robust suede leather that will be quiet in brambles?