Dhb aeron merino 9cm socksa pair of dhbs aeron merino socks will keep your feet protected comfortable and at an optimum temperature as they turn the pedals they are low in bulk with a 9cm cuff length and an essential part of your riding comfort compared to synthetic fibres merino wool can absorb a greater amount of moisture before feeling wet as it will quickly evaporate when the fibres cant hold any more merino wool is used for the main body of the sock whilst nylon heels and toe boxes