Ultra IV Mens Obsidian

The Ultra IV is your go-to amphibious footwear for exploring where land meets water—lightweight, flexible, and built for barefoot movement in nature.

OVERLAND, UNDERWATER—BAREFOOT AMPHIBIANS

• NO INSOLE - No insole, bringing you even closer to the ground for the full barefoot experience.
• VEGAN - Made from materials that are free from animal products.
• EASY TOGGLE FASTENING - Fast, easy and snug toggle.
• WEIGHT - Based on a single shoe in Men's size: EU 42 | UK 8 | US 9 - 296 g

The Ultra IV is for barefoot adventure-seekers who want to get fully immersed in nature. Made with 51% I'm Green™ Bio-based EVA (Braskem), these amphibious shoes are flexible, lightweight, and designed for barefoot freedom—allowing you to move naturally in and out of the water.

MATERIALS:

• UPPER: 51% I'm Green™ Bio-based EVA (Braskem), 49% Virgin EVA
• LINING: 100% Polyethylene
• LACES: Toggle: 90% Virgin EVA, 10% Bloom Rise™ EVA, Lace: 66% Elastic, 34% Polyester
• OUTSOLE: 39.84% Synthetic rubber, 27.38% Silica, 19.5% Natural rubber, 13.28% Additives and Pigments
• Made in Vietnam.

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