From city streets to shorelines, the Union Heather Amphibian 20″ transitions seamlessly from land to water, backed by ’69-proven expertise. SURFSILK Amphibian heather stretch fabric, featuring 4-way stretch, offers a smooth interior and durable, quick-drying exterior. Its straight Amphibian silhouette, regular fit, and fixed waist ensure a clean look, complete with side and rear welt pockets for essentials.