Adventure Bucket Hat. A technical summer hat with classic trekking style: the Trek Bucket Hat offers protection against the sun and light rain while providing great comfort and breathability. A design you know improved by the latest technologies on sun protection by BUFF®. Enjoy mountains and outdoor life to the top with the new mountain caps and hats by BUFF®. high-technology and BUFF® quality blend together in a pure outdoor collection. Created in a variety of shapes, each of the products in our trekking Collection offers a specific set of features, all in BUFF® style. BUFF® trekking products are designed for protection and performance while hiking, trekking or enjoying a walk in the forest.