Silk is the most hypoallergenic of all fabrics. An all-climate fabric, silk is warm and cozy in winter and comfortably cool when temperatures rise. Its natural temperature-regulating properties give silk this paradoxical ability to cool and warm simultaneously. Silk garments thus outperform other fabrics in both summer and winter. Silk worn as a second layer warms without being bulky and it is highly absorbent and dries quickly. It can absorb up to 30% of its weight in moisture without feeling damp.