Size M Leatt GPX 4.5 v20.1 downhill helmet Great helmet, loved every minute of the three rides I had in it, unfortunately don't have the time use it anymore so it must go. Would run you ~ 300$ retail. Specs: - Size M (runs true to size for me) - Very lightweight for the protection it offers (1150 ± 50g / 2.5lbs) - great ventilation - removable/washable inserts - routing for water hose on the inside - DOT certified