An interesting discussion has developed on the CyclingNews.com “gear” (no, not doping) forum. The thread is entitled “Cooler with or without base layer?“. Essentially it questions manufacturers claims that wearing an undershirt will make you cooler in hot conditions than if you weren’t wearing one. And a fair question too.
When we developed our mesh base layer, we designed it to be as lightweight and with the best cooling mechanism possible. We looked at other base layers such as those made by Castelli, Vermarc and Craft and we feel we could make something that was just a touch lighter and of course better on the hip pocket 
Close-up view of the MRCW Base Layer
Essentially the idea on the design is described briefly but succinctly by forum user “justme“. He/she says:
In a hot humid climate too much water can be present on the body which can actually make the core temperature rise to try and burn it off. In some cases the moisture in the air can condense on your body and add even more to the water. In a case like this wicking it away from the skin is the best.
Spot on!
Some people mistakenly confuse these lightweight mesh base layers as an item that will soak the sweat up. This is not true. It is not the design of the base layer and it would not work if it was. One thing you don’t want when climbing a tough mountain is a sponge under your jersey, carrying all of the sweat you’ve produced! Could you imagine?
Our base layers have been popular and we are proud of them, but how can they be improved? What are you looking for in a base layer? Your comments below are welcome.
Interesting. i would have thought the more clothing im wearing the hotter i would be. sorry but im not convinced. if its hot ill just wear a jersey thanks
Brocket that’s a fair comment, I think most people have a similar opinion. It all comes down to what you feel most comfortable in. Thanks for dropping by!