The whole entire sock is elastic with an elastic Velcro strap.
Sizes XS-S/M- L and XL
Up to six times more durable than Finnmark sock
Width (flat dimensions)Circumference
XS: 65-100 mm / 130-200 mm / 140 mm
S : 70-110 mm /150-220 mm / 140 mm
M: 80-110 mm/160-230 mm / 140 mm
L: 85-120 mm /170-240 mm / 150 mm
XL 95-135 mm /190-270 mm / 160 mm