Wool remained the primary fabric for clothing of all classes, while linen undergarments, which were more comfortable against the skin and could be washed and then bleached in the sun, were increasingly worn. Silk, although extremely expensive, was readily available to wealthy people of consequence. Silks from Byzantium were traded in Pavia by way of Venice, and silks from Andalusia reached France via Spain. In the last decade of the previous century, the Norman conquest of Sicily and the First Crusade had opened additional routes for Eastern fabrics and style influences into Europe.