Mountain rides include long ascents, cool descents, and the constant threat of bad weather. The Mavic Helium Jacket provides an ultralight barrier to protect you from chills and drizzle. Finding a functional mix of breathability and wind protection, the Dura Lite SL fits close to cut drag and its thin fabric features a drizzle-proof coating and micro vents to dump excess heat.

• Tightly woven, ultra-lightweight Dura Lite SL fabric effectively blocks wind and features a DWR coating so that passing drizzle beads away during rides
  
• Pro-fit hugs your core closely to prevent wind-flapping and to cut through the air while stretch back panels enable comfortable movement
  
• Micro laser perforations under the arms dump excess heat and sweat to keep you dry and cool
  
• Ergo Zip is offset so it doesn't irritate your neck or chin while providing additional venting during hot climbs
  
• Tall collar and drop back provide addition cool-weather coverage to keep you feeling prime for your ride
  
• Stretch cuffs secure the sleeves during high-speed descents
  
• One stretch back pocket holds a snack or other fuel for long climbs