Crewsaver Four B 70N Life Jacket in Black/Red The Four B 70N hybrid buoyancy aid is built for those travelling at high speeds on the water as well as being ideal for general surface watersports. Enhanced 360° impact protection combined with a Fusion 3D sculpted and lightweight foam construction helps to ensure both your comfort and safety remain uncompromised.   FEATURES   360° sculpted foam for extra comfort Fusion 3D technology Lightweight foam construction Super-fast mesh drainage D-Ring attachment point Reflective detailing Robust fabric Multiple adjustment points Crotch straps on the Junior version Crewsaver Four B 70N Life Jacket - Black/Red