The Tachyon Hooded Jacket is a true minimal masterpiece from Montbell. Sitting firmly in the ultralight category, it's an ideal trail running jacket to keep wind and light rain at bay while barely feeling like it's there at all. The key ingredient is that 7D ballistic Airlight fabric, keeping weight to an absolute minimum but while still offering a layer of defence from the elements. The underarm vents come in handy during uphill stretches, and it packs down to almost nothing when not in use, making it a great option for slinging in your pack for a bit of extra coverage when you get above the treeline.