'It does what it says on the tin'

Stand Up Paddle Boarding or Surfing is a relatives new sport developing in the early years of this century in Hawaii as an offshoot of surfing. It has moved recently to the UK and seems to ideally suited to the conditions on Belhaven Beach where the waves are few and far between and you have to chase the best waves. I heard that my physiotherapist who is a experienced sea kayaker has tried it out and is keen to develop her skills in this novel discipline. It's title is equivalent to its definition and akin to one of those "'It does what it says own the tin' appellations.