Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: does it come with a top and bottom, or do you have to buy it separately?
Document: Great price for important safety gear. Its not top of the line, but makes a excellent back up mouth guard.
Best you will get for the price. Tray is deep enough to hold to your top teeth after it's molded. Especial helpfull if your trying to ask questions while it's in.
Because of this, a strap is not required and the mouthguard naturally stays in your mouth.Bottom line: if you have to or want to wear a mouthguard for any activity, there is nothing that comes close to the shock doctor - or even worth spending money on, for that matter.
Great for the mouth and teeth and even your gums. I do MMA and this is perfect because it protecets my top teeth and it doesnt make my mouth look huge or obvious. It protects great
Pretty good mouthguard for the price; I use this for MMA and it helps during training to soften the head blows. If you're looking for a super serious mouthguard, I wouldn't say this is top-notch, but definitely good for the price.
This has to be one of the worst things I have ever purchased. Do not buy this product; it is a piece of garbage.
It's not the best I've every used, or the worst. I wouldn't buy it again because I have used better.
This was for my son. He said it was a little unconfortable, but no big deal. When we follow the instructions it got better. Will buy more from this seller.
Kinda different to get used to at first, but after a week of playing with it in it feels a little more natural. decent buy
It's affordable, it works great for when I go to the gym and work out. I would tell my friends to buy it.
Answer: yes