Blueguard - Heavy Duty Anti Abrasion Durable Moisture Control Work Socks 71% Cotton, 23% Nylon, 5% Polypropylene, 1% Elastane Machine Washable 1 Pair of Blueguard Anti-Abrasion Durability Socks, Engineered for Life. Blueguard anti-abrasion durability socks are proven to be the most durable sock ever created, achieveing an outstanding 925,000 abrasion cycles during a recent abrasion test. Anti-Abrasion Durability Yarn - High strength filament polymers that are bound and engineered for ultimate strength and durability. The yarn is high flex, has a high tensile strength, abrasion resistant, low moisture absorption and drys quickly. Blueguard comfort plus - A Durable sock is pointless unless it's comfortable enough to wear all day long. It's features include a comfort fit, cotton rich body, reinforced toe seam, arch support, extended heel and full cushion. 4 Sizes are avaliable and there is a choice between blue and black in the colour range.