Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Can this be folded or rolled up when not in use? (Thinking of it for a camper trailer.) How small?
Document: Anticipate buying a king sized one to use outside of the winter months. Best purchase I've made in a long time.
After placing this on top of our mattress we no longer wake up with aches and pains. The only complaint I have is the queen size one did not come with the cover on the topper and it was too small to fit on it.
This sleeps and feels great. I do not sweat on it. The only setback I see, which is said by others, it is a bit too small and leaves a 2&#34; gap all the way around.
this does not by any means stay in place which is one of the main reasons i bought it. i have to adjust it several times a night. and it is to small for my full size bed, it does not fit corner to corner. take your time and buy something else.
Had this 2 months now. Holding up great. Not a hot-making pad, if you use a cotton bed-pad and cotton sheets over it. Just right addition to my futon. I'm sure it'd be even better on a stiff traditional mattress.
Love sleeping on this mattres topper, would give it a five if it wasn't for the sizing. Ordered the king because reviews said it ran small, and I have a oversized queen. It hangs over the edge a little, which isn't too bad, but they should make the product true to size. The sheets fold the edge down, so it makes it a little hard to get on the bed; the bed is high anyway. The queen definitely would have been too small.
This arrived on time. I used it the day I opened it even though you're supposed to wait for it to come to full form and air out a bit. I do notice a slight odor but, for someone who cannot stand any odor from just about anything, this is very tolerable. This runs small as most reviews stated which works great for the futon it was placed on. I've tried other toppers and managed to return them...this one isn't going anywhere!
I really enjoy this mattress topper. I'm in the military and sleep on this plastic uncomfortable mattress and but with this topper it makes it feel like my bed at home(almost). The only problem I had is that I am a 6'2'' tall guy and the mattress is too short. To fix that I just use a towel at the end of my mattress and put my pillow on top to kinda extend the length.
Bought this as a compromise with the husband. We have a king bed with a heated mattress cover which you aren't supposed to use with a gel topper. Our mattress is so uncomfortable that I was tossing and turning all night with constant lower back pain. Mornings were brutal. Put this twin sized topper on my side of the bed and fell in love with it. Back pain has been cut at least 75%. Bed looks lopsided but I don't care at this point.
I love it! I'm a LIGHT sleeper and I had to be woken up the first morning on it. Couldn't wait to air it out. The two inch is sufficient for me at 125lbs at 53yrs old with a few aches and pains. I'm seriously thinking of getting a travel one when I go on road trips and one for my oldest dog. This was a good deal for me.
Answer: yes it can be folded, it fits a full size mattress