Reduced chafing ---specs--- Thread used in heel and tip % Polyamide % ElastaneThe fabric component used in the heel and toe is a polyamide thread that is twisted with a second PTFE-coated polyamide thread and together reduce the risk of blisters. Special seam around the tip Special construction around the tip allows the sock to follow the shape of the toe area perfectly. Product Testing This model has been tested on distances up to marathon length in order to ensure our most demanding customers get optimum comfort for the full duration of their runs. Composition Socks : 94.0% Polyamide (PA), 6.0% Elastane Care Instructions Machine wash at 104°F: May be tumble dried, preferably at low temperature Guarantee 2 Years ---/specs--- ---catchline--- This model has a comprehensive size range (e.g. 6.5/7 instead of 6.5/8) for a better fit. A special thread is used at the toe and heel to reduce the risk of chafing ---/catchline--- ---features--- Moisture management Fine air-cooled material that facilitates the elimination of perspiration. Fit Comprehensive size range for precise sizing and comes with elasticized strip. Reduced chafing Specific yarns reduce the risk of blisters at the toe and heel. User comfort Specially adapted socks for left and right foot, special seam at the toe. ---/features--- ---made_for--- runners who prefer a sophisticated pair of socks that protect and support their feet. ---/made_for---