Men\'s shoes. EVA shell and breathable mesh upper for a lightweight and flexible fit. Breathable mesh lining. 100% recycled mesh wrapped insole. 30% recycled integrated EVA foam insole. BLOOM performance foam is made of algae biomass, transforming green water into clean water in the process. FloatProTM Foam midsole for lightweight comfort that lasts. Outsole grade EVA for weight saving grip. Vegan-Friendly. Stylist Notes. Innovative, unexpected, and refreshing, Merrell's new Hydro Mule, featuring proprietary FloatMaxTM Foam with 10% BLOOM algae, is Merrell\'s unique, comfortable, and eco-friendly materials. Comfort you can feel good about.