DescriptionThe perfect blend of fit-warmth-wicking, the Mammut All-Year Longsleeve Shirt for Men features a performance fit with blended polyester microfiber / warm Merino wool and wicking body mapping to maintaining the optimum body temperature. The ideal performance baselayer for every winter adventure, 3 different moisture wicking fabrics that are strategically placed around the arm pits, sides and elbow warm when needed and vent where needed. This shirt is antimicrobial treated to avoid the fallout of unpleasant odor after multiple of long use.
•Fabric: Polyester Microfiber and Merino Wool blend
•Mid-weight panels with waffle backing structure for optimal insulation on rapidly cooling areas of the body
•Lightweight panels for optimal temperature balance
•Moisture wicking and quick to dry
•Antimicrobial feature to avoid unpleasant odor
•Recommended for: skiing, snowboarding, backcountry, snowshoeing, climbing, hiking cool workouts
For the same thing Arcteryx wants $120 in their Rho line.
I paid $54 for this shirt on sale online. Normal price for the All year is just under $80. The fit and cut is excellent but Americans be sure to size up if you want it to fit better since this top does shrink a bit after the first wash/dry and the armpits are cut small for the fit.
I'm 5'8 150 lbs (38R chest/15"neck/34"sleeves and normally wear a medium) and the men's large fits me perfect.
I also have the 2009/2010 edition of this top which came in red and gray color choices and which was cut even slimmer than this 2011/2012 edition. Also the 2009/2010 gave me issues with the thinner exposed areas like stomach and chest getting fabric pulls and piling from heavy use (as in from day spent bushwasking thru dense foliage).
The material on the 2011 version feels much more durable than the previous version all-year and has so far held up well from long weekenders with hefty backpacks and hipbelts rubbing away at it. The fabric also machine-washes well with no piling issues. Most synthetic base layers tend to deteriorate, stretch out or shrink and not fit or look the same after multiple washes but this isn't the case here.
In the picture below I wore it during a 35 degree moderate Autumn hike along the AT trail in Upstate NY. I only had a windstopper vest over it and Helly Hansen polypro layer underneath and was warm enough to not freeze when stopping for breaks and comfortable enough that I wasn't sweating or overheating during uphill pushes.