This is called the Speed Team 4 Piece Set.
It's a Target item, possibly Komar Kids, and will be in the boys/teens section. It's 2 sets of mix n' match pajamas. The main shirt is light blue with dark blue sleeves. It has the slogan "Speed Team" in a kind of retro font. There's modern reaching forward Sonic, running Knuckles and hopping Tails, along with some rings scattered around. The matching shorts are blue. The other 2 parts are all-matching fabric with red collar and cuffs. This one has pants & a short sleeve top. The design here is the same modern art for STK, but it is scattered around /small size all over the white background along with rings.
The sizes for this probably aren't that large, it seems to tend more into 'little kids', so probably not everyone can wear it. It's an all right modern looking set with good variety, and an all right price because it is 20 dollars for everything when it isn't even on sale. This is a winter 2021 Target item.