Sea band question...

So I get bad morning sickness and wanted to try the sea band. But the only one that’s available by me in stores is the gray one. The pink one I’d have to order online and I’m trying to get it ASAP! So my question is, what’s the difference between the 2??? I’ve always seen ppl get the pink one, I’ve never seen the gray one until I googled it trying to see where I can buy them.