Original review 4/2018, i gave it 4 stars:
I had great experience with Dainese products and I bought these to replace my Six Six One Rage Hard Knee Guard. They were good but had to adjust a couple of times during 2 hour rides and were hot in the summer; however protection wise they were solid. I have used the trail skins twice on two 10 miles rides. the first one had some substantial climbing and the second one was mostly flat with a few punchy climbs. Total number of adjustments = ZERO! So comfortable you forget you have them on. The only thing i notice on the first ride was that of the labels flapping around inside, i cutted them and the second ride was absolutely perfect. i have soccer quads and was at the max sizing of the mediums. I took a chance on the size and it was worth it. At first i thought they are to small but once you stretch them the Velcro and silicon keeps them in place. Make sure the strap is properly place other wise it will be itchy. The only reason i took off a star is because after the second ride a couple of the stitches on one of the straps came loose. I have not taken a spill on them, but i did slam hard my knee on concrete to see how they did, and you feel the contact but there is no pain transferring from the knee. Great comfort and so breathable, may be not the best for temps bellow 40 F or so. Will update on durability.
I fixed the stitches that came off and have not have a problem since with them. I have managed to tested them a few times and they offer great protection even on enduro types trails, the side protection on this helps a lot. They still stay in place and are so breathable, they have stretched a little bit which made glad i went with the medium size. Only on heavy duty bike park days i dont wear them, besides that they are money! up dated too 5 stars.