Relatively quiet, most gaiters aren't. They fit well, definitely tight as most of the reviews will tell you, but not too tight. I really enjoy them, as many places aren't making an inseam long enough for what I wear, gaiters are seeming to become a must have to prevent ride up.

I can't actually give these a star rating, as I was unable to use them - they don't fit at all and I will be returning. It was pretty disappointing as I was really looking forward to adding them to my kit. However, I wanted to post a review to help others people who might have questions about sizing.

I am 5'3" and female, but I power lift and have played a lot of sports over the years so I am very thick/muscular. Reading the reviews, I saw a lot of people commenting that these gaiters are way too small so I ordered the L/XL, thinking that surely they would fit me if they fit 200lb men. To my disappointment, they do not come even close to fitting around my calf. The reason: I AM SHORT. These gaiters are a smaller, lighter pair meant to come just above boot height - on a tall person, they sit a little way above the ankle. On me, they come up to the thickest part of my calf muscle which is much bigger in circumference.

Choosing size based on shoe size is not really helpful - measurements are. So, here you go and hope this helps.
For the L/XL:
~13" across the top/between the snaps, the part that will wrap around your calf
~10.5" in length, measured along the back seam
For fit, I would suggest measuring 10.5" from above your heel/where the bottom of the gaiter would sit, up the back of your leg. Then, see how wide your leg is at that point to decide if these will fit or not.
I wish FL would post this information, I emailed customer service to get measurements but was given different numbers.

I picked these up in hopes to get a lightweight, quiet, stretchy type of gaiter to simply keep debris from falling into my boots as they sit just above the ankle. There's some reviews that made me question whether or not to buy these gaiters. I am glad I did! I thoroughly enjoy them and I have worn them on every hunt / hike since getting them. They do fit a tad tight above the ankle, but that's how it's supposed to fit to stay up on your leg. I am no small guy... I am 6'7" and 260 pounds and they worked great for me. Durability seems to be good. I have noticed a small amount of fray after many uses but they are still in pretty great shape. I use them mostly in dry conditions to keep that debris out, but I did recently use them in about 6-8 inches of snow on a deer hunt. They kept the water off of my pant. They aren't waterproof, but I was pleased with how they worked on those conditions.

I purchased First Lite Traverse gaiters (size L for boot size 9.5 US) and am absolutely satisfied! They have been perfect for summer and autumn backpacking. On my recent thru-hike on Sourh Dakota's Centennial Trail, these gaiters endured 134 miles of mountains and prairies, scree and sand, wind and water. I got no ticks, dirt or wetness inside my boots. I probably bushwhacked 15 miles and had nothing get inside my gaiters.

The under-boot straps were durable, although less durable on light hikers than they would have been on traditional mountain or hunting boots because there is no recess between the heel and the rest of the sole.

These are much lighter in height, weight and warmth than my GoreTex gaiters.

I couldn't be happier with my purchase. These are better quality, and at a better price than many of the brands more popular in the backpacking and hiking scene.

I received my new First Lite Traverse gaiters two weeks ago and quickly got them out onto the trails for a few rucks, and they were perfect in keeping sand and trail dust, ticks and moisture out of my boots. I know they'll do the job preventing ticks, too.

I treated them with Pemethrin to also better protect me from ticks.

I wear a sized 9.5 boot and got the L/XL size and they work perfectly, thanks to the recommendation of First Lite staff.

I am 5'3, 150lbs, athletic woman - I ordered the S/M and they are barely fit around my leg. I am going to need to buy the larger pair. Seeing as these are a unisex product, I most certainly assumed I would fit into the S/M.

I am a 115 lb, 5' 4" woman and the S/M wouldn't even fit over my calf without pants/socks. The product itself seems great but I'm going to need to replace it with a large.

Never got a chance to use them. The L / XL wouldn’t fit around my calf (and I don’t have big calf muscles).

I bought these thinking I would use them in scree fields we sometimes have to walk across. Until one day, we were picking up a lot of ticks in the grass.I had remembered I had them in my pack and I never found them crawling on my legs after.

I was not very impressed with this product. The strap underneath the boot wore through on both pairs after one summer season. The customer service was great in replacing the gaiters, however they explained that I needed to add some extra tape around the straps if I was going to continue to wear them off trail or in rocky terrain? My thoughts are that FirstLite should make a quality product that the customer doesn't have to make home alterations to in order for them to work effectively in backcountry settings, otherwise remove the description that they hold up in all terrains.