Crocs Duet Max II Clogs. Bigger, better, and back in action, the sport-inspired Duet Max brings a more approachable silhouette to street style. A rugged, trend right outsole adds a modern twist while adjustable back straps allow for the perfect fit. Get ready for the Duet Max and add some edge to your day-to-day style. Molded Croslite™ upper. Rugged midsole sculpting. Pivoting, adjustable back straps for a more secure fit. Ventilation ports add breathability and help shed water. Customizable with Jibbitz™ charms. Dual Crocs Comfort™:. Blissfully supportive. Soft. All-day comfort. Imported.