After trying different gaiters over the years and listening to friends reports on their gaiters I have come to like the "Double D Leather"- canvas gaiters. They have no metal and are stiff and sit up well on your boots so they can be worn loose. Wearing them loosely is important for snake bite protection (never wear your gaiters with a tight fit). They breath well stopping your legs from overheating (a problem with the snake guardz type gaiters)
http://doubledleather.com.au/index.php?route=product/product&path=18&product_id=78
I know it is common knowledge....but just in case...always carry two of the 5 inch wide elasticated bandages in case of snake/spider bite. You need two to completely wrap a leg.(learn't this from treating sons funnel web bite). Get the stretchy bandages with the squares printed on them, so that the squares stretch into perfect squares when you have the tensioning on the bandage correct. I packed my bandages in vacuum sealed food bags in my backpack, so they stay clean and don't ever unravel. As always with first aid, don't trust me and check out st Johns for the latest info on snake bite first aid.
cheers RDD