Is 'lunettes de soleil' feminine or masculine in French?

A feminine noun before a masculine prepositional phrase describes the gender of the French phrase lunettes de soleil. The feminine plural noun lunettes means "glasses" and the masculine possessive singular phrase de soleil "of (the) sun," for a translation as "sunglasses" in English. The pronunciation will be "lyoo-net so-ley" in Alsatian French.