Kleinsub - 5mm socks.
Nylon on the outside and nylon with thermo function on the inside. The thermal function will keep your feet warm(15% more insulation) and due to the special thermal surface it is very easy to get the socks on and off, and does not require soap or lubrication to put it on! 
Recommended for free diving and spearfishing.
 
Size:
M - 40-42
L - 41-44
XL - 43-46
XXL- 45-48
 
Made in EU