PLEASE NOTE, THIS HELMET IS SOLD WITHOUT THE INNER FOAM. IT IS ESSENTIAL TO PURCHASE YOUR FOAM SEPARATELY.Size:Shell:The S shell is suitable for foam sizes 53 to 56The M shell is suitable for foam sizes 56 to 59The L shell is suitable for foam sizes from 58 to 62Foams (set B) to be bought separately: it helps to determine the final size of your helmetThickness 4: for helmets in 56S or 59MThickness 8: for helmets in 55S or 58MThickness 12: for helmets in 54S or 57MThickness 16: for helmets in 53S or 56MYou will also find a size guide on the product sheet to choose the right size of shell and foam.For the helmet foams:The SET A of foams (which goes at the bottom of the helmet and at the front) is included in the price of the helmet. The SET B of foams (which goes on the sides) is to be purchased in addition to the helmet. Both types of foams are absolutely necessary when wearing the helmet. The foams are machine washable at 30 degrees, and should not be tumble dried.CUSTOM…