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Regardless of how hot it is safety footwear must be worn on site. Dickies utilises modern, breathable fabrics as linings in many of its safety footwear products to improve comfort. Cambrelle and Tybrelle are carefully engineered synthetic materials with innumerable microscopic air spaces that greatly improve air circulation in safety footwear. Moisture is drawn away from the foot and stored in the lining until it evaporates after the boot is taken off. These modern lining materials are so effective they are capable of storing up to three-and-a-half times their own weight in moisture, resulting in cooler, drier, more comfortable feet.