Destination Spa - Clothing?

[Pegged Wrong]

So I'm going to a destination spa for a week and I have no clue what kind of clothes to pack. I really don't think I own anything that will work. Aside from work clothes, jeans and t-shirts, I have...pajamas. Really pajama-y pajamas...you know...matching Nick & Nora sets etc.

So I was thinking something along the lines of the pix below, but I don't know since I've never been. Any ideas???

*Credit: Yahoo Store anahataclothes.com