I was initially skeptical that this could work effectively. I can SWEAT, and I mean ALOT. This will catch probably 90% of the sweat from hitting the top and down tube, which keeps it from dripping down to cage screws and the crank area. I have a Trek Domane, which has a down tube storage section. Prior to using this cover, the storage door and recess would literally fill with sweat and make its way into the storage (and onto all of the wires and lines in the down tube). Shockingly, the cover blocks nearly every drop from getting to that area now. I can use them for a couple of weeks without any development of sweat stench. And, I have washed them in the machine wash (hang dried, though), and they seem fine so far.
I should add that I do not use the clear cell phone slot because I use a large towel over the stem/head tube and handlebars to keep that area dry. It would probably keep the stem dry, but there's too much there for me not to protect the area with the towel.
Hi - I notice when some people give negative reviews theyre all mad and stuff, but this isnt one of those ... so Tacx is cool and I have the Neo 2 and its great. So I ordered this Sweatcover thing and so this is just a problem of buying online and not seeing it in person.. my iPhone X in its case doesnt fit in this.. and I dont have the iPhone X plus big one, I have the small one... anyway I ended up buying a a rubber mount for my stem that I can easily put my phone on and off while bike is on the trainer... as far as a sweat cover.. hmm I need to figure that out still .. this would work for that but youre paying a bit extra for the Tacx brand and a phone holder that is probably too small