The Jack Wolfskin Atacama Roll Up Shirt is purpose-made for travelling in the hot sun The light fabric feels pleasant to wear even in the searing heat The fabric has a 50+ UV protection factor so it gives reliable protection from the sun And if it gets too hot simply roll up the sleeves and fasten them in place with the little buttons The fabric s stay-fresh properties are another big advantage when you re travelling It is specially treated to make it odour resistant