The Ultimate Special Forces Tactical Boot. The Shadow Amphibian is made in conjunction with the Navy SEALs and for military operatives to use while in the air, on land and while swimming. The passive drainage system is not designed to keep the water out, but to let it flow in and out of the boot as needed. Features & Benefits Hidden lace pocket KPU Grill designed to keep out debris while allowing for breathability Full grain leather Sleek vamp profile to allow a secure fin fit Carbonized rubber toecap overlay for abrasion resistance and durability Dual direction drainage ports Slip resistant injection molded rubber outsole Multi-density EVA designed to cushion at foot-strike and propel during toe-off Articulating heel and outsole shape for a quiet stealth approach Fin lock or IR Glint tape pocket Moisture-wicking, hydrophobic antimicrobial lining Puncture-resistant composite plate with rotation for protection and fatigue reduction Contoured metal arch Rip-stop nylon accents Engineered Achilles flex notch Seamless, lightweight quarter protection construction