Lightest weight certified helmet on the market
Amazingly well fitted
Quality is easily matching if not exceeding the most costly helmets available
Most Breathable
Adjustable dial
Removable padded mesh liner
Closable vents (including 2 air scoop style vents on the front)
Magnetic Quick Catch Chin Strap (no more having to deal with the hard to open buckles)
Helmet bag included
small / medium is 54 to 56 inches head size
large extra large is 57 to 62 cm
How to Measure Your Head
Place the string or tape around your head about 1/8″ above your ear, across the mid-forehead, completely circling your head. Hold the tape firmly, but not too tightly. If your measurement falls between sizes, choose the next largest size.