Women's ankle socks, cotton spotted design
A key reason behind the scarcity of 100% cotton socks is the rise of synthetic fibbers in sock manufacturing.
Made of natural fibres, cotton socks are known to be breathable and are often favoured to polyester because they're not man-made. Wearing cotton socks during exercise and outdoor activities has been shown to provide great ventilation and ensure you sweat less.
Synthetic fibers are more readily accessible and much easier to produce compared to trying to make cotton work. A big reason that synthetic fibers have seemed to skyrocket into the scene are their lightweight durability and moisture-wicking ability.