Review on 🏍️ HJC IS-Max 2 Chin-Curtain Motorcycle Helmet Accessories: Enhanced Comfort and Versatility for All Riders by Jim Young

As mentioned, they should be standard on helmets. I added this to my signature HJC HD helmet. It installs in seconds and offers excellent wind resistance. I noticed an immediate change and felt almost no wind on my chin area. It also reduced wind noise and allowed me to hear the Sena's tuning a little better at high speeds. Once installed it fits snugly leaving little room for an overhead mic like my setup, but you can stretch it out. Overall I am very happy with this purchase. The HD seller wanted to charge me a ridiculous amount if I remember, so glad I found it at Revain instead.