Granger Smith has released a special new T-shirt as a tribute to his 3-year-old son, River, who died in a tragic accident last week.

The "Damn Strait" singer turned to Instagram to offer the new shirt via his clothing line, Yee Yee Apparel. The new shirt is River's favorite color, and it features an excavator across the front. The side of the excavator reads, "Riv."

"The River Smith Tribute Shirt is on sale now," reads a post to accompany the picture. "100% of the proceeds from this shirt will go to Dell Childrens Medical Center in honor of River Kelly Smith. River was Granger and Amber Smith's youngest son who tragically passed away on June 6, 2019. He was cared for by the wonderful staff at Dell Childrens before he passed away. This shirt has a Yee Yee Excavator on it (Riv's favorite thing to do was watch excavators scoop up dirt) and is red- Riv's favorite color."

Smith turned to social media on Thursday (June 6) to share "unthinkable news. We’ve lost our youngest son, River Kelly Smith," he wrote.

Following a tragic accident, and despite doctor’s best efforts, he was unable to be revived. Amber and I made the decision to say our last goodbyes and donate his organs so that other children will be given a second chance at life. Our family is devastated and heartbroken, but we take solace in knowing he is with his Heavenly Father. Riv was special. Everyone that met him knew that immediately. The joy he brought to our lives cannot be expressed and his light will be forever in our hearts. If there are words to say more, I cannot find them in this moment. Love the ones close to you. There has never been a more difficult moment for us than this.

Smith did not share the nature of his son's accident, but the Tennessean newspaper in Nashville confirmed that River drowned at the Smith family home in Texas.

Smith has previously asked for donations to Dell Children's Medical Center in Austin, Texas, in River's name instead of flowers to honor not only his son, but also thank the facility for the care and compassion they gave River and the entire family.

"The doctors, nurses and staff have been incredible," Smith shares.

Dierks Bentley dedicated his CMA Festival performance of "I Hold On" to Smith after his son's death, and Florida Georgia Line turned to social media to share a heartfelt message with Smith and his family, asking fans to pray for them.

"Our brother and his family are going through the unthinkable with the loss of [their] youngest boy. Our hearts are broken for them," FGL write alongside their video message. "Y’all please keep them in your prayers and help us wrap them up with love and support."

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