They actually felt like yoga pants. They were stretchy in all the right places without being baggy. I find that stretchy stuff tends to get stretched out. I figured the same thing would happen to the Hyper Flex Full Seats so I gave them a thorough test. I rode in them (and did barn chores) three days in a row on some pretty warm days.
Lately, it seems as though all of the breeches I look at have a silicone seat. I haven't been very interested in trying them out. I've touched a few pairs of them, and they seemed really sticky. Recently, a friend was wearing a pair, and I asked her how she liked them. She felt like they were so sticky that her pants stuck to the saddle so much that she was left sliding around on top of them. Uh, no thanks.
The first time I rode in them, I sat in the saddle with a bit of trepidation. I was concerned that they would mar the leather of my saddle. The second my butt hit the saddle, I completely forgot that I was wearing them until I hopped off. The silicone was never an issue.
There were two things about them that I wish could be changed. First, they are a bit of a high rise; they sit over my belly button. Frankly, with the extra fluffiness of my middle, it's probably good that they're keeping everything in place. Secondly, they only have one of those mini pockets on the inside. While I do barn chores, I like to shove my phone in a back pocket. These don't have a pocket. I don't hold it against them though as most tights don't usually have pockets.
I am definitely ordering at least one more pair of these, and probably two. They come in black, green, and gray. Riding Warehouse sells them for $59.95, but I always have a discount code that will knock them down to at least $50.95 which still gets me free shipping.
Since it's already in the mid-90s here, these tights are getting moved to the front of the rotation. I better get another pair soon!