This is a set of three single-size mattress pads. ① and ② are N-Cool brand from Nitori. ③ is different. ② has a lot of noticeable pilling. ① and ③ also have some pilling, but not as much as ②. I'm selling them as a set of three, but individual purchase of 1 to 3 pads is also possible. Please let me know in the comments if you have a preference. I'd like to sell these as soon as possible. If they don't sell, I'll consider disposing of them.