Product code W15NT

NOW available in size 20/XL Adult!

The Wonsie Back Zip swimsuit is designed to prevent unwanted undressing and nappy access when having fun in the outdoors. The surf-suit style offers high UV protection and is crafted from a durable, chlorine resistant fabric in sizes suitable for all ages.

Our Back zip swimsuit features:

  • sizes for toddlers, children and adults
  • surfsuit contrast styling
  • heavy duty YKK zipper for durability
  • full length fabric placket behind zipper to protect skin
  • 3 press stud zip cover to hide zipper opening near neck
  • low knee length legs
  • stand collar to provide sun coverage
  • tag free to reduce irritation


  • Nylon/elastane
  • Please ensure zip is fully closed during washing or drying to prevent damage
  • Rinse after use. Cold gentle machine wash separately or hand wash with lukewarm water using mild detergent. Dry in shade.
  • Avoid rough surfaces and rubbing to keep fabric looking it's best

PLEASE NOTE: Prices differ between child and adult sizes, so please refer to the size selection drop down menu for prices. This garment has no incorporated incontinence protection, so a swim nappy may need to be worn if required.

Back Zip Navy Triangle Print swimsuit | Wonsie

Customer Reviews

Based on 7 reviews
Michelle Kimani (AU)

Best swim wear we have ever had. It’s washes and wears well. It’s comfortable and looks fabulous. Thank you

Bronwyn Evans (AU)
Zip back swimsuit

These swimsuits are incredible. I have searched for a longtime to find something like this that my not so little man, aka Houdini, cannot get out of.
I have used all the Wonsie items since Julie started the Business and can’t recommend them any higher for both quality and prompt delivery.

V (AU)
Fantastic adult onesie swimsuit one piece swim wear

This swim suit is perfect for my son who attends aquatherapy with an exercise physiologist weekly, but was beginning to pull down his regular swimmers in the water (which was tricky to resolve as the therapist was cautious about reaching underwater to help pull his swimmers back up). He also wears eenie swim pants under this. The sizing is as expected - I bought his regular relaxed size as we just needed a one-piece. For those who want a very fitted size, you may need to buy a smaller size than usual.

Kimmi Leahy (AU)

We love these swimsuits! Our 10yo can move freely in them, has no sensory issues with the material & they're easy to put on/take off him.

Maree Murphy (AU)
Beautiful well made bathers

My daughter is 13 and disrobes. These bathers have stopped that happening in public when she is swimming. She is very rough on her clothing and this is the third pair I have bought as I feel they are well made and three will be what we need to get through a summer of swimming. We went away over Christmas and she swam every day in the public caravan park pool without incident. I rinse the bathers out after every wear in tap water and have washed them twice. Colour is still as when purchased.

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