Craft

I was a bit skeptical about another layer under my aero kit in the heat. But I'm a convert now. The Craft Cool Mesh Superlight Baselayer works just as advertised and referenced in other reviews. The large holes in the fabric enable evaporative cooling when your kit would normally be soaked in sweat and clinging to you. I've been riding in temps in the upper 90's with humidity around 40% without issue, where in summers past the heat would be a factor. I've had a Craft winter baselayer for 20+ years, so I knew Craft meant quality, and this baselayer is no different. "Cool Mesh Superlight" is a perfect name, as you don't even notice you have it on under your kit. I have no way to confirm the claims of a 5 to 6 degree cooler ride, but I definitely feel cooler. For sizing, I'm 6' 2", 165lbs, with a 39" chest. I purchased a medium, which fits perfectly. It is long enough that I have to tuck the bottom inch or so into my shorts, but that's not an issue for me.

Based on my comparison of other products and other sellers, this was being offered at a great price, so I took a chance with it. It's well-made, looks to have good craftsmanship. The fit is a little bit on the long side, but snug-ness is good: not compression-level, but close-fitting, which is what I was expecting. I have to fold it back up at the bottom as it's longer than my jersey. Does it actually work to cool by air-flow under the jersey? To be honest, I can't really tell. It doesn't make things hotter, which would be the opposite effect. But do I feel more air flow? I'd have to ride a bit with it and then ride a bit without it for a back-to-back comparison. Unlike the other reviewers, my skin must be less sensitive to feeling these things. Otherwise, it's a well-made base layer and worth your consideration if you're in the market for one.

These are nice undershirts, especially as many have noted, when on sale which is often. I typically take a XL in Rapha jerseys and a L in Ornot and most other brands. I originally followed the sizing chart on these, but they are huge and they stretch a ton. I started with 2 XL's (shoulders way too wide), and then 2 L's (also way wide), and finally one M - perfect. Wish it hadn't taken 4 oversized ones to figure out the right sizing - feels wasteful and seriously inaccurate for the size chart.

The material and product is great though, just know they run incredibly over-sized as indicated.

I haven't used this in winter yet but I love it for an extra layer biking or casual/sun protection. Perfect lightweight layer when you might be too chilly in a T or jersey. Feels very soft and is compact to take along. The blue is my favorite. You will definitely find a use for it. I am 140 and prefer a loose fit, like the large. It is plenty stretchy if you want it to be snugger. Craft have always been durable for me. Great sale price.