The Ulna, is designed to be worn on the arm, but can be worn anywhere on the body. This knife is a very sharp, lightweight, and durable knife. The blade is constructed from Stainless Steel, with a hardness of 55-56HRC. The knife is low-profile and designed to be worn close to the body, eliminating “line traps” and minimizing drag. The “Ulna” is a minimalist blade, designed with the freediver in mind. Slim, strong, and lightweight, the “Ulna” checks in at a mere 85 g (2.99 oz) and with a 7 cm (2.75″) blade length. This small knife is a beast!
