Instruction: Given a question and its related document, determine if the question is answerable by analyzing the information in the document. Output yes if the document addresses the question, or no otherwise.

Input:
Question: it will be pair or single
Document: My first time buying this type of product. Didn't realize it came single. Got the first one at a good deal. Paid more when I ordered another. Also couldn't get the same size for the other arm. Better to buy in pairs.
working good and great cover almost the all arm and make you arm feel colder than out side and from the sun
very light weight does have the support needed and comes in black so it does not show dirt. breathable, will purchase again
very good product meets the correct function  to generate a good feeling when exercising in providing security and comfort when making movements
terrible, did not provide any compression at all and i ordered a size small! this is worthless, i returned it.
it seems to help some arm strain. i guess do to the increase in blood flow but the sizes seem to run small im a decent size guy so i got the XL and it was almost too tight to bear for more than an hr. could just be how it fits my arm but still seems to run small
What can you expect out of it? It compresses and it's warmer than no sleeve. $0.50 worth of material for over a sawbuck. It's the American way!
We bought this to help with pitching and catching and it really has been fantastic. It always goes to the games and helps to relieve pitcher's arm and help with the circulation. It's NOT to be used for an injury, however, so please, do not buy it for that purpose. However, to just keep with warming up and overall duration, this is a great aid. Washes and dries like a dream too.
Wasn't a believer but I am now, this Really works. Since I bought this, no arm pain no bruising.Strongly recommended.
This works exactly as it says. Fits relatively well. I probably should have gotten a large but the medium fits me well. I'm not super muscular but the medium would fit most unless you have big arms.
Answer: yes