If your feet are cold you can transform your NIBU boots into winter boots, simply by using NIBU boot socks.
NIBU Polar Fleece Boot socks are made from 100% polar fleece.
The socks keep your feet warm during even the coldest temperatures and fit perfectly into your NIBU boots.
Put on your NIBU boots, flip down the top of the sock over the top edge of your boot, and Voila! you have transformed your NIBU rain boot into a NIBU winter boot.
NIBU boot socks come in two sizes:
Medium is equivalent to EU size 36-38
Large is equivalent to EU size 39-41