Keep your kit dry on water and on land
An innovatively designed inflatable dry bag with shoulder straps, waist and chest straps. Head off for a hike or run, remove the shoulder and chest straps and it's a dry bag/tow float. Attach with the waist belt and leash and enjoy your swim. Will keep your gear dry and take an adults weight if a rest is needed.
Top tip: put your kit in the bag before you inflate it!