The "Katanpää"-class mine countermeasure vessels are constructed of laminated composite materials. They are long and have a beam of and a draft of . The hull, decks and bulkheads are made of fiberglass, which in places are up to thick. The decks are additionally reinforced with balsa and carbon fiber. This improves shock resistance against underwater explosions and reduces the vessels' magnetic, noise and pressure signatures that could detonate the mines. The low-signature diesel-electric propulsion system consists of two MTU 8V-396-TE74 high-speed diesel engines, each producing , and two Voith Schneider propellers. The "Katanpää"-class vessels are designed to operate in archipelagoes, coastal regions and open seas, and are capable of operating in ice. They will have a service speed of and a maximum range of .