The Free AR 4.0 Jersey FZ follows the same game plan as it's elder sibling, the Free Aero 5.0, except it uses slightly lower tech fabrics This helps unlock value by bringing the 4.0 in at a much lower price point. It is still a very fast jersey and almost unbeatable in this price category.
The body of the Free Aero 4.0 is constructed from Velocity Dry fabric on front and shoulders for improved aerodynamics and moisture management. Nervato fabric added to the arm make for an improved wind-slicing profile. Other highlights include a silicone gripper elastic at the waist hem and Castelli's Giro3 arm elastic for a flat aero fit. These items keep your jersey in place regardless of the effort laid forth. There are 3 storage pockets on the rear of the jersey for storage and a full zip YKK Camlock zipper is fitted on the front of the jersey.
We find the Free Aero 4.0 to be an excellent combination of value and speed. Last year this was Castelli's top of the line aero jersey and now it is offered at a lower price, and it is still just as fast. Most riders associate aero jerseys with racing, however, we find they also come in handy for longer rides. The material is form fitting but very comfortable and the lack of drag makes a notable difference.