Seago Seaguard Automatic and Manual Lifejacket 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 model. The abrasion resistant cover, together with newly designed buckle and single crutch strap makes the Seaguard 165 an all round lifejacket.