The Fly Vest, giving you just enough warmth to take the chill off, is an amazingly lightweight garment. Featuring brand-new lightweight construction with Castelli FLY Fabric Technologies: FFT. The sides and back offer enough stretch to get the perfect fit for this unbelievably lightweight vest.

Product features

• Super-lightweight construction with just enough warmth and protection
• Low/no collar for temperature regulation
• Castelli FLY Fabric Technologies: FFT
• GORE-TEX INFINIUM WINDSTOPPER inner lining
• CLIMA SL Insulation for extra warmth
• FLY SL Shell for wind and rain protection
• 100% recycled post-consumer outer shell and lining
• Top and bottom-opening YKK Vislon zipper
• 3 back pockets with zippered security pocket for valuables
• Elastic and silicone at waist to keep vest in place
• Reflectivity at waist

It almost doesn’t seem possible that a vest this lightweight can perform this well. When you first pick it up, you almost want to toss it in the air it’s so light. Castelli FLY Fabric Technologies: FFT make this almost-impossible vest possible. The CLIMA SL insulation layer and FLY SL shell are made with 100% recycled fibers that are amazingly soft and lightweight. The FLY SL shell is also treated with a water-repellent finish to keep you dry. The GORE-TEX INFINIUM WINDSTOPPER inner lining provides outstanding wind protection and is extremely breathable. The back of the vest has a stretchy jersey-weight fabric to reduce the weight and allow for a close, comfortable fit. The low collar sits against the chest to keep any wind from coming in, and the YKK Vislon zipper slides easily to open up the vest for extra ventilation. Three back pockets allow for ample storage, and reflective details increase visibility. It’s amazing this much protection and practicality can be found in such a lightweight vest.