The Cold Truth Sleep Out takes place on the 20th February at the Liberty Stadium.
We're sleeping out all night, helping to raise money and awareness of 5 charities that work in this area, who are helping to tackle homelessness.
Earlier today (29th January), Lee Trundle of Swansea City popped into the Wave to tell us why he's taking part again, and encourage you to take part too.
Take a listen to his chat with Jamie here
For more details on the sleep out and the five charities that will benefit from it, click here