Mountain Biking Jacket. Cut is important in a mountain bike jacket. Zip vents are helpful for this especially when combined with a good breathable fabric.

When choosing the best mtb jacket for your cycling excursions the main factors to keep in mind are comfort performance and durability. The material is a bit heavier than some packable jackets and appears to be more durable as a result. The best waterproof jackets for mountain bikers the products mentioned in this article are selected or reviewed.
Many mountain bike jackets are highly packable and especially lightweight.
The company rates the jacket as suitable for temperatures ranging from 2 to 10 degrees celsius so it should be suitable for the majority of winter days out on the bike. Pit zips if you want even more breathability to speed across the trail at full speed we recommend choosing a jacket with zips under the armpits. Mountain biking speeds are much slower than road cycling so a focus on breathability and venting is more important. The material is a bit heavier than some packable jackets and appears to be more durable as a result.