It is the second year the South Mandurah Uniting Church and Alcoa Pinjarra Refinery have partnered to provide Vinnies with the funds to buy the swags.
St Vincent de Paul Society Mandurah president Winston Rennick said about 400 people were sleeping rough on any given night in the Mandurah area.
"Providing these swags will make a real difference to those who are going through a hard time, particularly with the winter months upon us," Mr Rennick said.
"The funding we receive means we can provide specialised, hardier swags that are waterproof and mosquito resistant."
Get in front of tomorrow's news for FREE
Journalism for the curious Australian across politics, business, culture and opinion.
READ NOWThe partnership provides the Society with $3000 towards the purchase of specialised swags over a three-year period.
"We are incredibly grateful for this kind of support and it will go a long way to making a real difference to people experiencing hardship in our community," Mr Rennick said.
Alcoa community relations officer Gail Black said the company was proud to be partners with St Vincent de Paul in the important project.