Scotland’s weather is often changeable and the last few weeks have been swapping between wintry, spring and almost summery. So it has been difficult deciding what to wear for running.

One item that has offered a surprising answer is a new Mammut MTR 141 longsleeve top. I have not used Mammut clothing for running before (when I wear Mammut it’s for walking) so the top was a bit of an experiment.

Indeed, Mammut have brought out a whole new range of trail running clothes. The Mammut’s MTR 141 line includes a Thermo Jacket, Hybrid Pants, Thermo Longsleeve Zip and MTR 141 GTX® shoes.

Mammut women’s MTR 141 running top

Mammut claim: The MTR 141 Longsleeve is great as a running top and is distinguished by being lightweight and offering high air permeability.

Features include:

• Light knitted fabric, ideal for warm temperatures
• Great freedom of movement thanks to the high elastane content in the fabric
• Fast drying material to prevent chills and provide lasting comfort
• The material’s high breathability prevents the build-up of heat and promotes temperature regulation
• Treated with Pure technology by HeiQ to help reduce the formation of perspiration odours
• Flatlock seams for extra elasticity and to prevent abrasion
• Reflective logos for visual safety
• Slightly asymmetric cuffs
• Athletic seam design.

On test: Mammut running top

I have worn the Mammut for off-road running and at times when the weather has been very changeable. In just one outing, the conditions changed from winter to spring and then back again.

While very light and airy to wear, the top seems to keep body warmth in. This happened even when I was wearing only one other lightweight t-shirt and on a chilly day.

The fabric is also highly effective at letting out the sweat. After a run I can often end up chilly very quickly because the sweat generated while exercising cools and stays on my skin and in my clothes. But tops like Mammut are great at getting rid of this sweat through effective evaporation.

Unusually for a product made from polyester and elastane, after several wears (and no washing, for the purposes of this blog) the top doesn’t smell. Maybe it’s the “Pure technology by HeiQ” that has prevented odours forming? I am surprised, however, because it is usually only natural products such as merino and yak that stay non-smelly after multiple wears.

I also love the style and fit of the top. It’s not too clingy but still a flattering female shape. And the turquoise colour is amazing; really bright and fresh looking.

Mammut have done a good job with this product and I’ll be keen to check out other clothes and kit in their new trial running range.

See Mammut. For buying Mammut in the UK see Outside and shop around on-line.