Now here are 2 oddities...
These are...holiday...blankets? That's right: these are Valentines Day 'fleecy fabric' big blankets. But why? Valentines Day isn't that big of a deal, it's not really a holiday everyone goes out to decorate the halls for, so blankets specifically for it don't make a lot of sense.
But, here they are anyway, complete with their own unique Sonic & Tails art. Sonic is dressed as a Cupid, with white Roman Cupid sash & white feather wings. He's holding a 'love letter' (envelope with heart sticker) & a Cupid bow. Tails is 'Flying Cupid' with a little sash, wings & his Cupid bow is drawn with a heart tip arrow as he flies. Sonic has a blue background with face pattern & Tails has orange with a face pattern for himself. These blankets are 2 sided, the other side just has the pattern & no large character art.
These are sold at the Sega Shop, but are 54 dollars each!

After finding similar cloth blankets of similar size / materials in stores for around 20 or less, 54 seems rather steep. However, each one is certain to be unique thanks to its special art. These are a spring 2018 item.