Episode 55 | Managing Perspiration in Layering Systems: Wicking, Evaporation, and Ventilation 

Brynje is brilliant. Used it almost my entire life, and using it in the Norwegian military showed me even more how valuable it is.

Brynje Super Thermo long sleeve (I do sweat from the arms) Senchi Design Hoodie with Polartec Alpha Eizniz Merino Wool 240 gsm with zipper Forclaz 900 Softshell Windbreaker Columbia Silveridge (for hot days) The Packa Poncho 3F UL Rain Skirt My current layering system that I find to be ultra versatile.

Appreciate the discussion and info. One variable that may have been implied, but was understated was how much a person sweats. I happen to be one of those who for whatever reason has always sweat more than most others. I’m a farmer in Virginia ( hot and humid summers) so I know about high, extended work rate situations. Also means my hiking times are during the colder half of the year so this topic is of great relevance to me. Because I sweat so much it makes winter hiking/moisture management challenging. I have to start as delayered as practical- the “start cold” adage or I’ll have everything soaked through in under 2 miles even in easy terrain. Synthetic base leaves me clammy almost immediately, wool as mentioned is better until the fabric is saturated. Problem is I can typically reach that point fairly quickly. So I’ve found a synthetic/merino blend fabric to work better for me. Lately I found it works better with a “summer weight” synthetic/merino blend t shirt with “body mapping”, ie it knit with small holes in the pit and core areas under the 150 weight blend hoodie. Seems to help moderate the moisture transfer/comfort sensation the best. Because you still have to deal with the evaporative cooling issue, I cover those bases with a “Sun shirt” hoodie. One of those synthetic fishing shirts. That’s good down to the upper 20’s. Get to the teens, add a 250 merino mid layer (May not be ideal but that’s what I have). It’s just as critical to manage the extremities in similar layering fashion with blend fabric socks, gloves and hat. Managing the head temp/moisture is as vital for me as the core component to make the system work. My question is what is your experience with alpaca wool garments in relation to this topic? The marketing pitch is that this fiber has advantages of merino (type of sheep) but absorbs much less water. Thoughts?

Great podcast subject. Can you give a few examples of non wicking base layers that won’t give you the flash off effect. Most base layers I’ve seen are wicking. Thanks

What’s your opinion on USGI level 1 polartec silk weights and USGI level 2 polartec grid fleece? They’re pretty inexpensive and no frills but seem very practical.