Piz Buin Ultra Light Dry Touch Sun Fluid SPF15 (Medium) 150ml Piz Buin Ultra Dry Fluid combines immediate and effective UVA/UVB protection with an ultra light formula that dries instantly. The hydrating fluid spreads easily over your skin for a weightless dry touch feel. Enriched with an anti-oxidant Vitamin E derivative, it helps to prevent sun inducing premature skin ageing.