Blades sponsor DBL Logistics is giving away a signed United home shirt to help raise money for Bluebell Wood Hospice.
Managing director of the company, David Clarkson, will take part in a 15,000ft tandem skydive on Sunday (12th July).
The family-run firm, who are the current back-of-shirt sponsors of the Blades, are asking fans to donate to their JustGiving page ahead of the event, with all proceeds going to Bluebell Wood Hospice.
All donators will then be entered into a prize draw with one lucky winner, picked at random, receiving a 2015/16 home shirt signed by Blades players.
David, pictured with United legend Tony Currie, said: "Every donation will be included in the prize draw for a signed shirt as every penny helps the fantastic cause of Bluebell Wood Hospice.
"Sheffield United is very much a family club and it would be wonderful if Blades fans got behind this fundraising initiative."
Being afraid of heights, skydiving was not something David had even considered until setting foot inside the North Anston-based Bluebell Wood hospice during United's Christmas community visit last year.
He was overwhelmed by the bravery and commitment shown by the children, parents and staff alike. One of the children is Lara Spooner, aged six, daughter of school friend Jeremy, who frequently visits the hospice for care for Joubert Syndrome, a rare genetic condition passed to her by her parents' recessive gene.
David asked a staff member if there was anything he could do to help out and ended up registering for the 15,000-foot skydive - which he will do on Sunday at Lincoln's Hibaldstow Airfield.
"I saw the staff in action and I just wanted to do anything I could to help them out," said David. "The staff I spoke to suggested doing a skydive and even though I'm terrified of heights I signed up straight away."
Gail Parkin, community fundraiser at Bluebell Wood Children's Hospice, said: "David is without doubt doing a very brave and generous thing for Bluebell Wood Children's Hospice. It takes a lot of guts to do something like a sponsored skydive.
"We are so very grateful for the support we get from everyone in our communities. We need to raise more than £3m a year to keep our doors open and every penny raised really does count and makes a positive difference to our children and families.
Entrants for the Blades shirt must leave their email address in the donation message for their entry to be valid. A full list of competition terms and conditions is available below or on dbllogistics.com/skydivesufccomp
To donate and enter, visit justgiving.com/DBL-Logistics-Skydive
Competition terms and conditions
· Each donation to DBL Logistics' JustGiving page for Bluebell Wood Hospice will be counted as an entry. No minimum donation. (justgiving.com/DBL-Logistics-Skydive)
· Entrants must be residents of the UK
· Deadline for donations is 23:59 on July 12, any donations submitted after this date will not be valid for the competition
· The winner will be picked at random on July 13. An email address must be left in the donation message to allow a representative from DBL Logistics to notify the winner.
· The competition winner will receive 1x signed 2015/16 Sheffield United home shirt.