The Hobie Replacement Seat Back Strap with Hook is the OEM replacement for lost or damaged seat straps. The Hobie Replacement Seat Back Strap with Hook comes with the plastic hook attached.
Reading another review, these are replacement seat straps. They do not need to be sewn. They fit into a plastic buckle that stays attached to the seat. I have found the plastic hook on the end of the strap breaks from fatigue or exposure to sun light. I can't say it is a bad design by Hobie since my Kayak gets regular use and is of 2009 vintage. I am also a big guy at 260 pounds. I have replaced both seat straps now and have two straps as spare. I carry one in the pocket on the back of the seat. as a precaution.
Hobie Seat Strap. I write this review more to commend ACK than the Hobie product. However the genuine seat strap replacement meets all of Hobie Kayak's high quality. I was on vacation in the Florida Keys in February. I was using my kayak every day. When the seat strap broke, after 6 years, ACK shipped overnight. I had the part in less than 24 hours. Hats off to ACK.