Mix and Match Cali Block 15'' Swim Shorts. The Mix and Match Cali Block 15'' Swim Shorts are designed with an elasticated waistband featuring drawcords for a perfect fit and lasting comfort both in and out of the water. Equipped with hand pockets and an inner mesh pant for water release, these shorts also include O'Neill Hyperdry technology for rapid drying once out of the ocean. They are crafted with 50 % REPREVE® recycled polyester and feature a cut and sew panel.