Supertees are the brainchild of Jason Sotiris.

Mr Sotiris realised the need for better children's medical garments after his daughter Angela battled a rare cancer, Langerhans cell histiocytosis, in hospital.

The shirts, or costumes as Mr Sotiris likes to call them, are designed to make it easier for nurses to check temperatures, insert and remove tubes and wires, and change clothes.

"They have press studs on both sides, running from the underarm down, they have shoulder studs as well, and these studs are plastic so they can go through an MRI machine or PET scan," Mr Sotiris said.

In other news:

"They are very durable, and the spaces between the studs allow for those wires and tubes to be disguised as they come out and the child remains their dignity.

"It has the underarms exposed for thermometer checks that the nurses do every four hours."

The costumes will be delivered on Christmas eve by volunteer Sean Lopez, from Abermain, who will be making the trip to Sydney to collect the tees and then delivering them to Maitland Hospital and the John Hunter Hospital.

Mr Lopez said he spent a lot of time in hospital as a kid and a teenager, and knows first hand what it's like to be in there.

"I've helped deliver them dressed like a superhero, and I see the smiles it brings to the kids and the parents faces as well," he said.

"Some of these parents haven't seen their kids smile in months and when someone walks in with a present like that for them and the kids faces light up, the parent's faces light up as well.

"Being a parent that hits home so I love doing it."

Mr Sotiris was told his daughter had a 20 per cent chance of survival, and what followed was three years of very difficult and careful treatment.

"I can't thank the hospital and health system that we have here in this country enough for saving my little girl," he said.

"It's very difficult when you have a little girl reaching for you to save her and you can't do anything."

Angela is now five years post treatment, and Mr Sotiris said you can imagine what it was like singing happy birthday to her at her last birthday.

Mr Sotiris was looking for ways to try and help his daughter get through her hospital stay, and one issue was how difficult it was to change her when she was connected to all the lines and tubes.

"It was one particular night after a day of chemo, she was very weak and any movement really upset her, and I just thought if I could have ripped that shirt off I would have," he said.

"These kids throw up often, from the chemo.

"So the idea went off in my head - why hasn't someone made it a lot easier for these kids?, and that is where the process started."

The Supertees process "failed forward" and after two years of trying velcro, zippers, buttons and ways to manipulate the garment to cater for everything, Mr Sotiris was able to head back to the hospital that treated his daughter and hand out 100 Supertees to the children.

"Now we are nationwide and we supply to all the major children's hospitals including hospitals with paediatric wards like Maitland, and our goal is to provide them to families for free," he said.

"Any family, any child given bad news that needs to face a life threatening condition, I want there to be a Supertee waiting for them because of the love and generosity of someone out there that bought it for them or donated it to them."

"It's the battle armour that these kids need when they face these really difficult treatments they need to face".

Mr Sotiris is calling for 2000 donations, or 2000 children helped this Christmas.

Every $45 donation means a child will receive a Supertee gift pack.

People can donate to Supertees here.

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