Splashed out on an Event waterproof last year, having heard many times that they are the most breathable waterproof EVER (and being disappointed many times with Gore Tex). After a ride last night I came back totally soggy inside. It wasn't leaking 'cos the outside of the jacket was relatively dry. I didn't feel to be working that hard, or at least certainly wasn't getting hot.
Put up and shut up or is there a better waterproof option for sweaty betties?
No, they all do that. Get a cycling cape.
Wear less underneath so you don't overheat - but a "breathable" waterproof cannot get rid of the amount of water vapour you produce when exercising hard.
eVent's the only thing I've used that's been acceptable. In fact, I think it's pretty darned good
Tried wearing less underneath, so you don't get as hot, and don't sweat so much? I always go with the "cold in the carpark = right temp when riding" rule.
If I wear any less underneath I would have nothing on. I wear a thermal top and that's it. It too was soggy. That was kind of my point. I don't feel to be over-heating at any stage. My body must just sweat for the fun of it 
Are you "big boned"? the larger more rotund amongst us have a lower surface area to volume ratio so find it harder to lose heat so tend to sweat more. Not a lot that can be done about that.
Another eVent fan here.
One key thing is how you layer, as that can really have an impact on moving the sweat away from you and on to the jacket, and then on out. I've recently switched to merino base layers (Endura and Patagonia) and am very much impressed.
I'm a really sweaty bugger and nothing works for me either! I've settled on a merino wool base layer and an eVent jacket and this is the best combo for me when the temp is above about 8deg C.
So I agree with the wear less philosophy.
But unlike your good self stilltortoise my core/main body is boiling all the time.
What doesn't help are backpacks, they ruin me in terms of sweating but sadly a cage and bottle on my Prophet just doesn't work.
Am not rotund at all and sweat like fury.
eVent's really good if you are realistic about what any breathable jacket is ever going to do. You'll still sweat, whatever you're wearing next to your skin will still get wet, and not all that mositure will escape, even if a lot of it does.
In addition to that water will get in at the neck and up the sleeves sooner or later.
I bought a Montane eVent softshell off Ebay last year. The fabric is waterproof but the seams aren't sealed, so it's not technicallly 100% waterproof. That said, it's never leaked though in the 3-4 times it's been used in rain. I wear it for general winter night rides and when we stop there's literally steam coming off me all over, so I can see it's breathing. I just wear a merino base layer underneath it and it's superb, no other word for it.
I'm a veritable rake and have the same problems with sogginess on the inside of my jacket.
I've tried a Gore XCR jacket which was touted as being the breathableist fabric around - it's been rubbish and I'm not sad that the zip has recently broken. With that jacket I think the outer fabric had a lot to do with it as it was pants at being water-repellent and got mucky very easily (when a breathable fabric is wet or dirty it simply stops being breathable, though is still waterproof).
A North Face HyVent-something-or-other jacket seems to be a little better but I've just bought a Gore Paclite jacket that has proven to be much better, just because it repels water and crud very well, thus remaining breathable.
The other alternative is a jacket that sacrifices a little waterproofing (so more "water resistant" than proof) for breathability thus providing a balance between water coming through and water staying in...
Having asked for, & received, a Pace 3x3 'e-vent' jacket for xmas, I've been a little disappointed how damp it's got inside, but that's probably through having too-high expectations (will have to try the merino stuff soon). I'm a pretty slim build, & usually sweat less than most.. It's definitely better than my old Altura though. Going to stop testing it out in dry weather soon!
I wondered when someone would ask the big boned question, but no I'm not. I'm average build. My base layer is a Duofold jobbie that used to be popular in the outdoor world 10 year ago or so. I have had Merino before - albeit cheapo - and it was OK. Maybe I'll try it again.
Funnily enough I did have a pack on but my back wasn't the sweatiest bit of me
Cheers
Get fitter, sweat less.
Or, don't bother with a waterproof and keep warm by not stopping.
Membrane jackets just can't shed vapour fast enough, particulary if its raining
Paramo is more breathable but to warm for cycling for much of the year
Ookay. So here's how it works.
Breathable fabric lets water vapour through, right? And it does - that's a fact. So if you sweat and it evapourates off your skin, it'll go through the fabric at a certain rate. However if you sweat too much, liquid will form on your skin ie you feel wet - and that's not going to be magicked away by breathable fabric. So what you need is something to help the liquid sweat evaporate from your skin.
That's why you ALSO need a base layer under your waterproof which soaks up the sweat and transports it to its outside, from whence it can evaporate more easily, a process known as wicking. Lots of base layers are advertised as wicking, some are better than others. Most reputable brands are good, but I have to say in my experience merino isn't quite as good as synthetic for wicking and is also warmer which can exacerbate the problem.
If you are cycling hard and you're warm hence sweating a lot, you'll most likely produce far more sweat than could ever be shifted through eVent. The only option then is to cool down by opening up the zips and vents.
You may want to consider not using a waterproof at all. Even if its raining, you can still stay warm and cosy using appropriate clothing and a windproof layer, which will be much more breathable than a waterproof. You are only wearing the waterproof when it's raining hard, aren't you?
To dress appropriately you need a base layer for sweat wicking, as much fleece insulation as is appropriate (fleece transports sweat nicely) and an outer shell to stop the wind ripping through you, if it's cold.
I ride in windproof, fleece and base layer if it's cold, then I lose the fleece if it's above say 5 degrees and use various thicknesses of base layer until it's maybe 15 or so when I'll ride in just a base layer.
Don't use 10 year old base layers either. I had one and it was nothing like as good as a modern one. Plus, it wasn't even stretch enough to hug me skin tight as a base layer needs to do. And it was quite warm which wasn't good when trying to manage sweat.
If you open your jacket to vent the vapour condenses and turns to fluid, which is unable to pass through the fabric. I know it's a lot more complex than that but i can't be bothered to explain. I’m sure someone will be a along with a "Google-n-paste" to clarify things shortly!
So boys, keep it zipped 
Do you actually need to wear a jacket? If it's raining heavily then yes, but otherwise, just get on without one. If you're cold, just turnaround your attitude and cycle harder.
I need to work out how to stop my face sweating now...
With that jacket I think the outer fabric had a lot to do with it as it was pants at being water-repellent
Water repellency is not a property of the fabric, it's a coating that has to be renewed all the time. If your jacket's not repelling water ie the raindrops are not beading off but soaking in, then you need to use Nikwax TX direct or Grangers reproofing whatever it's called. Grangers is better I think. This is true for every jacket out there. You shoudl be doing it every 3-6 months depending on how dirty your jacket gets, what you do with it and how often you wash it.
Goretex XCR is the most breathable fabric if you are on top of Everest. Every fabric apart from eVent breathes better the colder and drier it is outside the jacket. So the UK with its warm dampness is the worst place for Goretex etc. eVent on the other hand works well regardless of outside conditions. The downside is that you need to reproof it more often.
just read this: "Get fitter, sweat less."
What a crock. Even at my fittest I sweat like a nun in labour.
The only option then is to cool down by opening up the zips and vents
Cool down? But I'm not hot, or even that warm. I'm comfortable, but getting steadily soggier
To dress appropriately you need a base layer for sweat wicking
So boys, keep it zipped
I will replace my old thermals and see how that works for me.
turnaround your attitude and cycle harder
To ride harder I need to ride faster. To ride faster (at night) I need better lights. This is going to be expensive If you open your jacket to vent the vapour condenses and turns to fluid, which is unable to pass through the fabric. I know it's a lot more complex than that but i can't be bothered to explain.
With Goretex and other PU membrane fabrics the water vapour has to condense on the inside of the membrane to be absorbed byt he PU and transported through the holes, so your post is incorrect. Plus, if you zip up your jacket you'll get really hot and produce far far more sweat in the first place than if you were properly vented, so it's a silly way to improve breathability...
On the subject of 'thermals' surely thermals are quite warm? I have base layers that are very thin and wick so well that you actually feel cooler than if you were completely uncovered in some conditions.
For breathable waterproof membranes to work well there needs to be quite a large difference in either temperature or humidity between inside and out. The ideal is cold and dry outside (although if it is dry outside why would you need one?). So actually waterproofs for riding in Britain are a bit gash as our rain often occurs when it ain't all that cold so you don't build up the required differential until you are very hot and sweaty. Plus having a bag on your back removes a large portion of the breathable area and the rest of the coat probably hangs loose around the front where to have full benefit it needs to be a snug fit.
Edit - lots of this appears to have been said while I made a cup of tea before pressing post. Hey ho!
The outcome of all of this is to wear softshell stuff unless it is absolutely hacking down! I use one of the old gore phantoms and wear it 9 months of the year. THE best investment I have made in biking kit of equipment bar none.
Shack what you say is perfectly true apart from eVent fabric. eVent is different in that it has actual tiny holes in it that let air through. You can feel it a bit when in wind actually. Which is why eVent is so good for the UK - shame that Goretex have everyone's attention tho.
+1 for wearing non waterproof, but softshell I find way way too warm unless it's about -5. North Face Apex is lovely stuff but still kind of warm.
Oh and saying ride faster to keep warm is stupid. What about when you get a puncture, or a mechanical, or when you get tired.. bit stupid really.
If I know if isn't going to rain a lot I do wear a windproof rather than waterproof. It is excellent. You can see at the end of the ride how much sweat is produced because it is damp to look it even with no rain in the air at all.
Personally I have more or less given up on "breathable" waterproofs. In my experience they are neither waterproof for very long or breathable enough for cycling. I only use them if its light rain. when its tipping down I use non breathable kit that is actually waterproof and allow a lot of venting / air circulation to prevent sweat build up.
Works for me.
I've never had one leak. They are a good tool to make me feel comfortable when it's really pissing down and I don't want cold water running through my clothes, but I dno't wear one often.
My eVent is pretty light and packable so most of the time I just keep it in my pack, and wear a windproof/soft shell the rest of the time.
It doesn't properly rain that often and as much as I rate eVent a non-waterproof fabric will always be more comfortable.
Having tried everything from eVent (Rab top-end) to your cheap-and-cheerful fabric jacket I couldn't find a combination of waterproof and baselayers that I got on with. Just found myself sweating too much to make the whole exercise pointless.
Now I wear a combination of Rapha softshell (the lightweight one) and baselayers / jerseys. Far more breathable than anything else, is water 'repellent' but most importantly keeps me warm and comfortable. It is also very, very quick drying. I'm actually upgrading to a stowaway jacket as I'd use it more if it packed down smaller (I'm selling the Softshell if you'd be interested 
).
With Goretex and other PU membrane fabrics the water vapour has to condense on the inside of the membrane to be absorbed byt he PU and transported through the holes, so your post is incorrect. Plus, if you zip up your jacket you'll get really hot and produce far far more sweat in the first place than if you were properly vented, so it's a silly way to improve breathability...
molgrips – I stand corrected by your superior knowledge of the universe and everything.
I did say someone would be along with a Google-n-Paste to explain
Get fitter, sweat less.
Not true. I sweat way more now I'm fit than I ever did before.
Going back to the original question - various people have said it, but nothing waterproof lets liquid through, only water vapour. So once you sweat enough for it to become liquid, you're buggered. Anyone who says that their jacket breathes perfectly either just naturally doesn't sweat much, or doesn't exercise very hard. Breathable waterproofs are fantastic for walking and that level of exercise (slow cycling is fine), but once you start putting in effort, you want something non-waterproof.
One thing worth trying is Buffalo stuff - it is designed based on the fact that breathable waterproofs don't work, and is designed to keep you warm even though you're wet, and to dry very quickly. Pretty expensive, but not that expensive compared with other fancy biking jackets. They do a lightweight one which might be okay for summer (the normal weight stuff is very very warm - for winter mountaineering mainly).
http://www.buffalosystems.co.uk/ls6.htm
Joe
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