"The best part of the shoe is right here, in my opinion. Intertwined in the shoe it has James Watt, which is my grandpa's name," Watt says in the video. "It has his division, his battalion, his regimen, so it's a really, really, special shoe," Watt said.
Watt introduced the first line of Valor shoes last year, with proceeds benefiting the Navy SEAL Foundation, KHOU reported.
Watt's brother, T.J., who plays for the Pittsburgh Steelers, mentioned the latest line of shoes Sunday, noting that he wore them before Sunday's game against the Los Angeles Rams.
"Missing you everyday, Grandpa," he wrote on Twitter.
James Watt died in February 2014.