I own the previous version of the V3 produced in 2009. My size medium measures 28" from jaw-crest-jaw and weighs 1350g. Although there is no MIPS, it is a great helmet with an excellent liner and great fit. I recently purchased a new MIPS V3 on closeout and needless to say I'm a tad disappointed. The new V3 in a medium is both LARGER and HEAVIER than the older version. Some have stated otherwise, but it's clearly listed on the inside of the helmet. Come on Fox....a newer model....that's 1" larger and over a 1/2 lb. heavier than the older version....and more expensive?! The MIPS is cool, but it squeaks like crazy. The helmet also fits much tighter due to the changed liner and the strap liners are no longer sewed on. This makes the strap liner rest inside my ear making for an annoying and unsolvable issue.
Noticeably and measurably larger and heavier, plus a few other annoying attributes in quality of construction (that aren't even matched to the older version) mean you can find better if you plan on paying full price.
Great product!! My son was using an older protector and I surprised him with this new one. He was so excited! Fits great!
At one of his races he wiped out going up a big hill. The first thing he told me was that his new chest protector worked really well. 5 stars from this Mom!!
Although these fit great and appeared to offer great protection, one of the rivets popped out the first time I wore them and kneeled on the ground to take a picture. Another rivet popped out about an hour later after tipping over sideways at low speed. Not exactly the quality I was expecting for the price.