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

Input:
Question: What is the weight of the fill used in this heated mattress pad?  I am comparing as I do not want to feel the wires.
Document: I struggled with purchasing a heated mattress pad (Queen size) for multiple reasons.1) Will I feel the wires?2) Will I feel the plug connection at the bottom of mattress?3) Will it actually heat up and not stay hot when I turn it off.I have used this model (DesignSmart controller) for about a week.1) Wires. The description says the wires are "virtually impossible" to feel. I guess if you pressed really, really hard you could feel them.
But since this model has a 10-hr time period before it shuts off, I just turn it on when I remember a few hours before bed.So far I'm more than pleased, works well, heats up nicely, can't feel the wires, entire mattress surface is heated and able to set the heat right where I want it.UPDATE: Plug connection - I did get tired of hitting the plug connection with my feet at the bottom of the bed.
The heating pad works exactly as described. The topper is very comfortable and fits the mattress well. I cannot feel any wires whatsoever.
Heating up the bed before you get in is heaven. The mattress pad heats up gently and fully. Easy to use controls and the wires in the pad are barely felt. I much prefer the heated mattress pad to an electric blanket.
There are many things to like about this mattress pad; it's soft, I can't feel the wires, and it heats up quickly. But I wanted a mattress pad that I could set to turn on at a certain time, and shut off at a certain time - this one can't do that, despite what it said in the description. I wonder whether I received the correct controllers?If I can get this issue resolved, I would give this pad 5 stars, because it's really nice.
Never have written a review, but love, love, love the heated mattress pad. First time I've used one, got tired of crunchy heating pads or microwavable heating pads that give out after an hour. This is lovely and warm all night long, no more cold feet. And the cats love it too, and they can be found nestled on it during the day, if I forget to turn it off.
I did much research on many of the different heated mattress pads and am very pleased with this model. A few "bonus" options on this model that are not noted in the product details:1. Time SetYou can set the time on the controllers (see why you'd want to do this in #2)2. Set time for Pre-HeatBy setting the time (see #1) you can also set a time for the mattress pad to start the pre-heat function.
I would recommend this product. This is the second Sunbeam heated mattress pad I've bought and I love that this one is machine washable. The old one lasted about ten years so I expect this one to last a long time too. I have poor circulation in my legs and my feet never seem to feel warm enough. A few minutes after I turn the pad on my bed is toasty warm and I'm able to go right to sleep.
The Sunbeam places the plug at the foot of the bed, where a tall person's foot is certain to feel it at some point. (My prior heated mattress pad, no longer made, had its remotes plug into the mattress pad on the side edges of the bed, where you never actually sleep so you'd never feel them once in bed.)
At first, since I tend to sleep on one side or the other of the mattress, the plug connection was un-noticeable. But when sleeping in the middle of the bed I did finally feel the plug connection with my feet. But it is not a harsh feeling. It is a noticeable but smooth little bump. I agree with other reviewers that you would get used to it.3) Heating:  Heats up just fine.
Answer: Don't know how much fill, but we don't feel the heating elements in the mattress.  When we make the bed the heated mattress pad is put on first, then a standard mattress pad and finally the fitted and top sheets.  You don't even know there is something different about the bedding - except it keeps us warm on cold winter nights.