i know those cold water sessions are limited on time before the cold creeps in . Trying to stay warm is key by any means .
today in the water , another surfer asked me what was around my wrist and ankles . so i told him i had velcro straps around my ankle/wrist cuffs keeping water from getting in my wetty .) I have only seen a few that do this , velcro , duct tape , or old surf board leashes , fin leashes etc . it does make little bit of a difference out there , hope it helps a few . But the best advice for the cold water has always been " a plane ticket "