Seaguard Auto and Manual  Lifejacket 165N with Harness The versatile Seaguard 165 is an updated design of a popular lifejacket model that Seago has been producing for more than a decade. The comfortable contoured neck design, with fleece collar, and its light weight combine to make this lifejacket a most favoured entry level models. The abrasion resistant cover, together with newly designed buckle, single crutch strap and lightweight d-ring makes the Seaguard 165 an all round lifejacket.