This is the 260 Tech undershirt from the Icebreaker brand. The undershirt is similar to other longsleeves from the Icebreaker brand, but this one is a warmer and medium weight version of the predecessors. This undershirt is the perfect base layer for winter activities because it is made of 100% merino wool and has a lovely turtleneck. The shirt has a slim fit model so that it fits nicely on the skin but is not too tight and therefore ensures good freedom of movement. In addition, the shirt is very comfortable and has offset shoulder seams so that there is no friction.