Bedsock or Footie?

What would be the best qualities for bedsocks? These are for my mother-in-law who is allergic to wool. First they need to be soft and comfy. Cotton Fixation is the perfect choice for yarn. I don't have much experience with it, but after a bit of getting used to I like it. It goes fast after the finer yarns I have been using. At first it felt a bit sloppy, I don't think I would do stranded knitting with it, but that could be my beginner's colorwork technique.

Second, they would be cheerful. I used a technique I call spiral striping. I don't know the official name. I started with one color. Halfway round I attached a second. Then I knit one color until I came to the start of the next continuously. I made solid heels and toes for interest. I love the look of eye of partridge heel. Although here you can see what I mean by "sloppy", the stitch definition isn't as good in fixation.

Third, don't cut off the blood circulation. I made a knitted hem. It seems better than ribbing that pulls in. Also the stretchiness of the fixation is good here.

The colors in the picture are not true. No matter how I struggled, the purple heel and toe look blue in the picture. I tried white backround, wood background, interior light, cloudy daylight.

Looking around Ravelry, I just found a tutorial on the spiral stripe technique. I am using only 2 colors so it works really simply. Because one of the yarns is variegated and one solid, it looks more complicated than it is. Here is the link: Spiral Stripe tutorial
Used Tootsies Footsies pattern as a reference.