Oneill Assault L.S. Vest USCG #3555 The O'Neill Assault L.S. CGA Vest has been engineered with a super-lightweight Fluid Foam and designed with anatomical flex points that allow the vest to compress, twist, and expand like a second skin. The O'Neill Assault L.S. CGA Vest provides Coast Guard Approved safety in a low-profile, lightweight, and form-fitting shell.