The microcapsules Outlast collect the body's residual heat during activity and gradually release it during cooling, keeping feet dry at a comfortable temperature.Suitable for cold climates and low-intensity or passive activities.28% Outlast, 28% Merino Wool, 34% Nylon Nenyl (antibacterial) and 10% Lycra.Size S: 2 cm shorter than size M // Size L: 2 cm longer than size M
