This is called the "Spray Paint Trio Tee".
It's a classic style tee with a great new look! The line art borders for Knuckles, Sonic, & Tails are done with thick 'spray paint' effect that has spatters and drips. The paint colors are character coordinated. Knuckles is in his classic standing, Sonic is in the Japanese 3-point/pose, & Tails is neoclassic, running forward but looking back. They DO have eye/interior details, just the line work for them is thin & harder to see on this smaller image. With the black interiors & colorful spray effect, this tee is able to give the classic art a fresh and lively look for your shirt collection. Very nice!
This could be an Amazon tee in 2020, but is it / or, where else could it be?