The Mammut Longsleeve All Year Base Layer weighs 148g (men’s S); closer fit; uses three fabrics (including merino wool) on key zones and vulnerable areas; rougher seams on outside; excellent wicking; quick-drying; feels durable; zip version £60. But closer fit than many others, and fabric has little stretch, so ensure freedom of movement before buying; styling may scare some off.
(01625) 508218; www.mammut.ch
Verdict: The Mammut Longsleeve All Year Base Layer is well-engineered and wicks excellently, but is very snug and quirky.
Review by Simon Ingram
First published in Trail magazine October 2009