O Fit Insole with Bloom Algae Foam: Insoles made with Bloom Algae technology use sustainable algae biomass without compromising durability or comfort. REPREVE: contains recycled materials helping us lighten our impact on the planet. Oboz ACT (Adaptive Cushioning Technology) Impact Midsole leverages Intelligent PU to create lightweight midsoles for a variety of footwear with long-lasting durability, support and rebound for optimal comfort. Constructed using high tenacity fiber technologies, weight for weight, CORDURA fabrics are exceptionally durable Oboz B-DRY waterproof/ breathable membrane