Compared to the previous comment, I just want to clarify something important.
The CrossFade LP2 is a helmet "CIRCUM AURAL", ie, the pads include the ear and completely isolate.
The M80 and V80 models mentioned above, are them "SUPRA AURAL", ie, they land on the ear and therefore does not completely isolate.
The real difference between LP2 and V80 / M80 is their size, the more bass hit on the LP2, and more open to the M80 / V80.
Well, now you can make your choice with the right information.
2 These helmets are also very strong, more so than some other headphones in fashion, and just as light to wear.