At 135g, this LIFA Stripe Crew base layer weighs a little more than the 114g that Helly Hansen claim (according to my scales), but it is still a very lightweight option. However, I found that this top felt small and tight for a size Medium. If Medium tops are normally on the tight side for you, I would strongly recommend sizing up here. That said, I found the top comfortable, with plenty of shoulder movement. I also really liked the stretchy band around the wrists, which helped keep my arms warm when walking in a cold wind.
Price: £35 | Weight: (Size medium) 135g. | Materials: 100% LIFA Polypropylene | Features: Slim fit, solution dyed. LIFA fabric. | Sizes: S/M/L/XL/XXL | Women version: Yes | hellyhansen.com
Breathability was superb. I really enjoyed using this LIFA Stripe Crew base layer for higher intensity activities such as hill-running and cycling when I knew I would be working up a sweat. The material is 100% LIFA Polypropylene, and it does a really good job at moisture management. This base layer dried extremely quickly after wearing it in the rain. As expected for a base layer made from entirely synthetic material, I found that this garment was not quite so well suited to cooler conditions. I also found the material to be quite delicate. The seam stitching is prone to developing loose threads, and I had some thread-pulls on the arms after only wearing the top for two days.
I found odour control to be adequate, but after periods of moderately intense exercise, the garment did start to smell. It was noticeably less effective at odour control than others in this test, but more effective than other synthetic base layers I have used in the past.
At £35 this is an affordable option, and particularly well-suited to people who favour higher-intensity activities or are prone to sweating. It is also very lightweight but be aware that the sizing is on the small side, and that it is less durable than other options.