Injinji Liner Crew GRY
The Injinji liner series provides an extremely thin 5 toe sleeve protective base layer to be worn with your favorite outer layer sock offering the best fit, feel and performance inside ANY shoe. The Injinji liner offers superior moisture management and eliminates skin-on-skin friction which is one of the primary causes of blisters.
Veiw Pictures for size guide.
Also available at the Sheffield Accelerate store.