Short days, brutal weather - it must be cyclocross season! Wout Van Aert, Fem Van Empel, and Zoe Bäckstedt are battling through the Belgian mud and onto World Cup podiums, with rabid ‘cross fans cheering their every move.

VLT stands for Visible Light Transmission and it is the amount of light that makes it through a goggle’s lens. This article will guide you through VLT percentages, their meanings and uses.