Rating: 4 / 5
The Berghaus tech T long sleeve base layer is a top quality lightweight synthetic base layer designed by one of Europe's premier gear manufacturers. This is a summer base layer, roughly equivalent to a cap1 weight base. It has a 1/3 length zipper with a nice smooth motion and plenty of length to provide chest ventilation. The sleeves are a little on the long side, providing extra coverage of your wrist and the base of your hand. I have the red/gray and I am rarely seen with out it on the trail or in an urban environment!
The only weakness I've discovered with this base layer is mosquito protection. You need to treat it with permethin or something like it, since it provides no protection whatsoever against the little biters. It seems to cope well with DEET, so that might be an option (unlike with some other synthetic shirts I have worn).
Love this shirt for summer hiking.