Instruction: Given a question and the related document, predict if the question is answerable based on the information provided in the document. Output only yes or no.

Input:
Question: Thinking about using for outdoor sporting events - Minnesota. How long do they last?
Document: Who hasn't used these? Sporting events, chilly days, playing in the snow, walking to work or on a college campus, whatever... these are awesome. My mom is always cold so I put these in her stocking for Christmas. She loved them!
These are great for sporting events, where it can get real cold. Take a pair in your coat and you're good to go for the entire day. Really makes things more enjoyable. Also work great in your shoes. Totally changes a cold day experience.
Great for sticking in your gloves or pockets if you need to be outside for long periods of time - hiking, working outside or any other types of winter outdoor activity.
If you know someone who has outdoor work or you are going to be outdoors at an event for a long period of time, I recommend hand warmers to you. It is a great product that I will order early this year before the next winter season.
I have been using these for years & ordering off Amazon, since a better price to buy in bulk & find the stores would be out when I needed them. My office is freezing & we are not allowed heaters,so these are life savers. They do take a few minutes to warm up, but then will last a good 12 hours after that. When I get home my hubby uses the last of the heat on his neck. I like to travel with them also, as they can come in really handy.
My children love snow sports which means they are out in the cold quite a bit. With these hand Warner's, they never get cold. Last a long time.
We used these on the ski slopes this winter and they were very good at keeping our hands warm. They didn't last as long as they said they would a couple of times, but I think that was because it was very windy on those days.
They definitely get hot and do the job, problem is, they take a while to get there...I'd recommend opening them up at least half an hour before you intend to use them as this will give them plenty of time to heat up. They last a VERY long time and are tough so they don't puncture or rip.I went hunting with them and would open 6 at a time, 2 for each one of my hands in my gloves and 2 more around my neck (would stick them inside my turtleneck) and then 2 more for my boots and boy did they keep me warm (almost sweating in 15 degrees)
Always handy to have for my hunters but also to carry in glove compartments and while doing outdoor activities. Great stocking stuffers.
these really do stay warm all day. Started using for golf, even thou gloves you can feel the warmth, and they do stay warm all day
Answer: yes