MS69 is designed for sailing and boating with the durable PP cone and IP Level 66 material. With the fully sealed crossover components, the speaker can withstand the harsh sea environment. The aesthetic sports styled grill gives the cone ultimate protection meanwhile adding a modern look to your boat. Take our watersports to a new and higher level with quality waterproof marine speakers! exposed to inclement weather. The plastic grill and basket are UV-resistant and can withstand the harsh elements found in marine use or outdoor audio applications including corrosion and rust.