Columbia Sportswear Mens Blackfin - Greynavy 13 . The future of water footwear is here Unlike anything before the BlackFin will stand out on the water or the beach. Water-resistant canvas lace-up uppers with molded Techlite heel cup for stability. Omni-Shield advanced repellency for water stain protection. Perimeter-stitched Techlite footbedmidsole with contoured shape for cushioning and support. Non-marking Omni-Grip outsole. Imported.