Riffraff, a clothing and furniture boutique in Fayetteville, will donate 20-percent of all sales between 2-4pm Sunday to the foundation.
The Miller McNeil Woodruff Foundation works to raise awareness, fund research and offer support to families affected by spinal muscular atrophy.
Patrick and Meredith Woodruff started the foundation after their son, Miller, was diagnosed with SMA Type 1, which is terminal.
"It's honestly the best feeling ever, it really is, it just makes you feel good inside to know that you're giving to something like that," says Tarah Hill, Riffraff employee.
The store also presented a $2,000 check to the foundation for the amount raised off sales of a special "Miller" dress.
For more information on the foundation, click here.