Pinnacle Aquatics says: The Merino-Evolution Undergarment is the world’s first drysuit undergarment incorporating the wonders of Merino. This undergarment is intended for use in the coldest waters of the world. The Merino lining not only keeps you warm in frigid temperatures, but it also is soft and comfortable, breathable, and wicks perspiration away from your body. It is perfect for use in waters from 50°F to below-freezing.
Our experience: Before we purchased this undergarmet we found that most of dive shops and websites, that do not sell this product told us why the merino was a bad idea (and why their product was better). However, every personal review we read said that the actual dive experience was great wearing the Merino-Evolution. We were happy to find the personal reviews to be spot on. This undergarment is warm and comfortable. We did not want to take it off after the dive. I worried it would be too hot, but that was not the case. We are happy warm divers with our new Merino Evolution undergarments. We will give you a long term report in a few months.