The first helmet I received was a little too tight. My head measured for a size small but I really needed a medium. Sent back the first one and when I got the medium it fit great! I love how the helmet fastener cinches down and makes the helmet fit snugly under the chin and around behind the head. I have no problem with it moving around whatsoever when skydiving. I don't have any problem with air flowing up underneath and "inflating" the helmet. There is significant noise reduction during free fall. I have gone head down at over 200mph and still the noise reduction is very good! The audible altimeter pocket makes my N3 feel like it isn't even in my helmet but traps the sound enough so I can hear it loud and clear for my free fall and canopy alarms with the volume on low. The downside to the audible pocket is that it does make it somewhat difficult to wear glasses with an audible inside. The audible pocket is quite small. The N3 silicone sleeve will not fit on the N3 altimeter and in the audible pocket (recommended by Alti-2 in instruction manual for N3). The buttons on the side of the lens are easy to find when unlocking it. The lens can be opened easily even with gloves on. The lens is a little heavy when I walk with it tilted up it gradually moves downward with every step. Wish it was a little more tight with the movement. I typically will flip the lens up a little bit when under canopy and have no problem with the lens slipping down even when I perform full toggle turns. However, the lens will come down quickly if you have a hard landing which is quite nice because it keeps dirt, grass or anything else from getting in my eyes or inside my helmet. I recently purchased a smoke lens with mirror finish. The mirror finish lens on a flat black helmet looks great! I get many complements from it. The smoke lens is a little darker than a normal pair of sunglasses. One complaint I have gotten with the smoke lens is that fellow jumpers cannot see my eyes. Both the clear and smoke lenses are durable and do manage to hold anti-fog coating for a while. Square1 recommends FogtechDX Anti-Fog wipes which are kind of expensive but are not needed often. Square1 claims that eyeglass cleaner or alcohol based lens cleaners can damage the lenses and can cause the lenses to fog worse. I have no problems with fogging whatsoever. Overall I love this helmet! It is comfortable, snug fit, easy to unlock and change out the lens, and has a great field of view. The field of view is so good that I cannot see the borders of the lens. I would recommend this helmet to anyone.
