On mine, I installed a Cal-scientific, the Large-max wide model,, i think it does real good, and ive been driving bike a couple of times in the low twenty's to work,,(25 mile commute) The aero-dynamics, of the bike is such that i feel alot of air on my upper back and neck, so i have to make sure to have good jacket, helmet, sealing..... when its that cold i where my snowmobile balaclava under helmet, which covers neck and upper shoulders.....