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: will this headband prevent concussions?
Document: Not sure this will help. The doctor @ the DuPont Concussion Clinic said this will not help. When the head is hit, the doctor described the brain acting like jello in the head. That movement is causing the concussion, so this headband won't prevent that movement.
Do we ask doctors to evaluate ballistics and offer testimony regarding gun shot trajectory and velocity? I think not.Here's the truth about what this product is and what it does:It's a glorified Styrofoam headband made to look semi-attractive enough for a female soccer player to wear it. Does it work in "reducing" concussion? Absolutely it does, based on the simple laws of physics. Does it "prevent" concussion; of course not, that's just silly!
As a coach (U12 Girls) , I get newsletters via email from time to time. Another coach and I were going over an article we had both read about some college teams making these mandatory for their players to prevent concussions. We were at practice and I pulled this headgear up on the internet and showed it to our players. My daughter had no idea head protection was available and instantly asked if she could have one.
Fortunately, I can't tell if this will help prevent a concussion because my daughter has not taken another blow to the head. After two concussions 11 months apart, we were looking for protective gear but wanted less than the Cal libero wears (she wears martial arts headgear). We saw a player wearing this and our neurologist mentioned Full90 by name when we asked about preventive equipment. The headgear is lightweight and adjustable, with lots of velcro. Being a teenager, my daughter was worried about how it looked.
It's definitely making me (mom) feel better that daughter has this head protection on. It was recommended from her soccer coach. The black matches nicely with her hair and it looks like a big headband. My daughter tells me it's comfortable.
Used to prevent future head injury from fall.Light weight and no viewing obstruction. Provided sense of safety while playing tennis. Recommend highly.
Amazing product! This headguard prevented serious injury to myself and a teammate after a full sprint collision. Definitely recommend for all levels to help prevent head injuries.
She did a head to head with another player and she wisely sat out the rest of the game. She was wearing the head gear and did not have any lingering headaches the next day. It does provide some temple protection too. I only gave the product 4 stars because I don't think it can prevent all types of concussion that can occur in play.As for playing with it, she is getting use to it.
It has saved me and my son from many a bad injury and concussions. So worth the money. Comfortable on too.
Outstanding. My son has had 3 concussions. He is now wearing this playing indoor soccer. Age 17. I highly recommend ordering this product.
Answer: yes