Kristin Cavallari Instagram Story featured Lack of Color's 'The Ventura' hat that has been a mainstay in Kristin's wardrobe for a few seasons now, and it's not hard to see why - it's such a timeless summer style. It's woven from straw with softly frayed edges and trimmed with a black grosgrain ribbon, which is fastened into a sweet bow at the back. The unstructured brim makes it easy to pack into your suitcase.