As well as being soft and fine, Viloft yarns are hollow and contain unique air pockets to trap air close to the skin, keeping you warm and providing superior thermal insulation, whilst allowing skin to breathe. The special viscose Viloft fibre creates textiles that are particularly warm and skin-friendly. Viloft is naturally soft, supple and breathable. Extremely soft material benefiting from being thin, lightweight and breathable, making it unnoticeable under clothing.