Uncommon goods used to have a microwaveable heating pad shaped like a lap cat, but I don’t see it on their website now. You can also get shawls to drape over her shoulders that can be warmed up. https://www.uncommongoods.com/.....eat-pillow

Another thought: handwarmer gloves. (Oh, I guess unfrumped cover this already.) I like the kind that are like fingerless mittens, so you have maximum use of your fingers. Like this style on Etsy. A friend of mine used to make them out of the sleeves from thrifted sweaters or old socks.

Down! I have a down throw that I love - it is almost too warm! And what about a down vest? A vest doesn't feel as constricting as a coat but is nice and toasty.

I just wanted to mention a great little space heater that I discovered a few years ago. It's the Chimneyfree Powerheat Infrared Quartz Electric Stove Heater (a mouthful!) from Walmart. I ordered it 4 years ago for our unheated sunroom, and it's still going strong with frequent use. I can't seem to post a link, but it looks like it's $65 at Walmart right now. And it is really cute...looks like a little wood stove!

Oh, and I meant to mention...it wouldn't likely be enough to heat a room on it's own in a cold climate, but as supplemental heat it's great. I love to sit in the chair closest to it and read...feels so cozy and has pretty "flames." Also doesn't seem to dry out the air like some heaters can.

I have a black fake fur electric throw--bought for me--but my two black cats have taken it for themselves.

Also have space heaters. Seems a shame to have the furnace blasting when I'm home alone occupying one room.

warmies. they have a website.

I have the Ugg lined sweatpants (we are in cold OH) and they are super super warm!

My 98 year old mother swore by washable silk long underwear. Lands End and L L Bean both carry them. They feel lovely against the skin and are near weightless. She also insisted on sneakers for good traction, but was happy with wool or wool-blend socks. We kept a mohair blanket around, which my cat equally loved.

She lived in the Adirondacks for years before she moved in with me, so she might have grown used to the cold.

Great suggestions. I have a pair of uggs and they really do warm me up. Layers, space heater and hat were my first thoughts.

A vote from me, of course, for down/something puffy.

Great suggestions! I edited my original post with some warm technology bottoms from Uniqlo. I'm going to see what I can find in store tomorrow. Those plus an ultra warm heat tech top. I did a little more probing tonight and she doesn't like wool socks because they're itchy so I'm sure I can find a not itchy wool sock and see what she thinks. She also said that she's had increasing difficulty with her skinny jeans - too tight at the ankle so maybe it's time for a change! I just noticed the packable vest I got from Uniqlo isn't down... oops. At least it's cute.

@Roberta: Thanks. I think she used to have silk long johns but I think she doesn't like the extra layer no matter how thin beneath her pants. If the warm pants don't work, that will be an option worth checking out!

I will sometimes put on a hat (winter toque/beanie) indoors to warm up fast. I also like hoodies that have comfortable hoods for the same reason.

Good morning! I’m thinking of your mother because I’m chilly. I always wake up cold these days. I think it’s my pulse. This morning it was 52. Yes, that’s a “5”. I pile on the covers, but am still cooooooooold until I make myself get out from them & move around. Maybe have her do some (chair) exercises?

Lined joggers, wool socks, if she can wear wool, one of the warmer Heat Tech tops, like HT fleece, and a small space heater. I use the latter, mine is about 2 lbs., in my office, and I have another in my bathroom. If she can bear to wear layers, I swear by long sleeved silk tops. Good luck to keeping mom warm & happy!

Because she is sedentary and have such low weight, I don’t think that she can regulate her temperature on her own. Some kind of heater is the way to go.

Everyone has such great suggestions. We spent a couple of winters off grid in Northern New Mexico, in the mountains. As a Canadian, I reverted immediately to winter survival mode, and bought deep winter things, during the pandemic, so all online.
Uniqlo sweatpants lined for both DH and I, and their fleece windproof zip hoodie was a lifesaving house sweater. He is 80. Not underweight
Quilted faux fur lined booties (the gear ish ones are safe to walk in, think Keen Howser)with no socks were very warm. You could wear them outside! And wash them. Like Uggs, which are a great option for older people, slide in, no socks. Had two pairs, so no laundry bottleneck.
Sheepskin fleece to sit or lie on was a tip from an older German friend. Also available in washable faux.
We used car camping type sleeping bags and dogs for comforters. Also washable. There is a theme.

My mother had MS and sat in a recliner all day. Feet got the coldest and wool throws were helpful over her legs. Get her an alpaca cardigan. Fingerless gloves may help keep hands warm. She may want. She may want clothes a size too big for easier off and on or using the bathroom. My mother wore pants and joggers for warmth and modesty.

You've gotten some great suggestions already, but I would go with a space heater, lots of layers, and a hat. I know you mentioned you were nervous about the space heater, but today's are very safe (e.g., features like automatic shut off if it gets too warm in the room or they get tipped over, etc.).

How is your mother's chair--is it warm enough? My mother (90 y. o. in Jan. 2023) spends most of her time sitting in a special chair (which has four different positions and thereby offers some variety for her back and legs). In the chair we have placed a large blanket folded into three layers reaching from below her head to below her knees. She loves to have that large warm blanket kept in her chair, year round.

In addition, she always has thin and thick wool blankets at hand, to cover and warm her legs and lower body.

In winter, warm knee-long socks, turtleneck pullovers, warm cardigans and light wool shawls are among her favourite clothing items.

They seem pretty cheery and cosy.

Haha @ Cee. They do look toasty! I've been busy assembling a warmth capsule. Just got the heated throw last night and will have her try it out this weekend. Also got the fleece lined joggers and an ultra warm Heattech and am waiting to get home to hear about their performance. Portable heater may be next! Will report back!

I like the ceramic heaters—radiant heat is the best!

Updated in the original post in case this might help anyone else in a similar situation. Again, thank you all for your suggestions. Super helpful!