Have used a warm-weather baselayer for a few years, Craft was the first brand I tried. The sale price made it a no-brainer I needed replacement. White does show some sweat stains (although not until several months of wearing it 2-3 times/week) so also bought a black one this time.
Crafts cool mesh super light baselayer is a life saver on those hot, humid 90p,us degrees days. Effectively wicks the heat away from your core and keeps you from bonking in the heart. Sizing runs small, order a size up.
It's still too early to tell if this will fall apart over time. I plan on using it weekly as I did with my Pearl Izumi baselayer and so far it's lasted me 3 years with no issues. So I will compare it to my PI. It's very light, and comfy, keeps me cool in the Florida hot and humid weather. I don't feel sticky at the end of my rides and still able to not feel overheated. I bought a size medium, which I usually wear, but appears to be more loose. Maybe next time I'll order a small and see if it'll fit well. Anyway, like I said earlier my review might change over time since I'm going to compare it to my PI that I've been using for over 3 years and so far nothing wrong with it.
As per most reviews, the baselayer does run a little big. I am 6'1 208 and pretty big overall and there is some slack in the amount of fabric. Otherwise, the shirt does settle in and helps to wick sweat. Pretty decent quality shirt. I should have bought a few more. I will when they are on sale again.
Used under jersey in all weather conditions. Keeps a layer of ventilation when it's hot out allowing cooler air layer between skin and jersey, jersey doesn't stick to the skin.
I was always skeptical about wearing more layers to stay cooler in the heat. But, I suspended that impression to give this a try. My conclusion It's still hotter when you wear more on hot days. Where this thing excels is when I do a mountain ride with significant altitude gain and rapid temperature change. It can start out hot and humid and turn cold and wet within a few miles. Having the additional layer in those conditions is welcome as it does help insulate the core. As far as the idea of a 'loft layer' that allows better air circulation between your skin and your jersey so that you stay cooler? I don't really think so. Get this and wear it if you're going on a long ride in changing conditions, especially if it's likely to cool down significantly over the course of your ride.
I had never worn base layers except in cold weather, but after seeing many pros wear mesh base layers in hot weather, I decided to give this a try.
I wish I had tried these a long time ago. Using one under bibshorts is much more comfortable - no more chafing from the straps, cooler in hot weather (as long as you're not wearing a tight black jersey), and warmer in cool weather.
I now own several of these and they've survived many dozens of washes with no adverse effects.