![Comparison review: Comparing the base layers that are perfect for winter trail running [RUN+TRAIL collaboration project]](https://outdoorgearzine.com/wp-content/uploads/DSC08890_mini-1024x576.webp "Comparison review: Comparing the base layers that are perfect for winter trail running [RUN+TRAIL collaboration project]")
Comparison review: Comparing the base layers that are perfect for winter trail running [RUN+TRAIL collaboration project]
Arc'teryx , Base Layer , SmartWool , icebreaker , Patagonia , Mont-bell , Rab , Merino Wool , Comparison , Trail Running
Written by Yasushi Hisatomi
![A must-have for the fall and winter season! 10 recommended merino wool base layers you should wear now [2015]](https://outdoorgearzine.com/wp-content/uploads/DSC00360.webp "A must-have for the fall and winter season! 10 recommended merino wool base layers you should wear now [2015]")
![We've seen what changed Patagonia's latest base layer [Full Remodel]](https://outdoorgearzine.com/wp-content/uploads/Tim-Davis.webp "We've seen what changed Patagonia's latest base layer [Full Remodel]")
