Swim nappy for a 4 year old ?

[TheodoresMummy]

I am going to start taking DS swimming on Sunday mornings.

Trouble is he's still not great at telling me he needs a poo. Leaves it 'til the last second.

Soooooo, I need a generous sized swim nappy.

He's quite a big boy. Weighs a bit over 3 stone and is solid.

Any recommendations ?

Mother Eden Trickle Free Trainers are great as a swim nappy, I use them on DD and DS2 under a neoprene happy nappy

I've got an extra large kooshies one which says 16-24kgs on the web but it is huge £2.50 delivered, pretty sure my large chunky 4 year old would fit in it easy, it's much larger than the large size IYSWIM