Sonic Midweight Merino Wool Sock Size:Medium Rechargeable lithium battery with 3

Rechargeable lithium battery with 3 adjustable heat settings (4-6 hours charge life)

It wicks moisture to keep you dry

S/M (most women)

the BackThing™ gives optimal support without restricting movement

• Inherent stretch for freedom of movement

Sonic Midweight Merino Wool Sock Size:Medium Rechargeable lithium battery with 3Our improved R. U. Outside Sonic Midweight Sock is an ideal year round sock for snowmobiling, skiing, biking, hiking, working and more. Constructed of 85% Dri Release Merino wool, 15% Nylon. It is taller and more comfortable than the last model. Extra arch and ankle support is sewn in, and the heel area is reinforced for durability. It wicks moisture to keep you dry, and makes the miles fly by, all year. Constructed of incredibly comfortable Merino