It is 3am. Do not start by shopping for different slippers. First, keep your mother seated on the bed. Turn on the light she normally uses. Put her usual slippers where she can reach them without leaning.
Ask her to put them on while you watch. Do not pull her up or test how much weight she can hold. You are looking for a smaller problem: whether each slipper stays in the same position on her foot from bed to toilet and back.
If she has just fallen, is hurt, cannot get up safely, or seems different from usual, stop this check and use the first ten minutes after a fall. The slipper check can wait.
The problem you are trying to see
A slipper can look secure while she is sitting and still change when she stands. The heel may lift. The upper may twist. Her toes may grip inside it. The sole may catch at one floor change and slide at another.
Public fall-prevention guidance includes attention to footwear and household walking hazards. The supporting public references are collected on the Sources page.
Your question is not simply, “Are these good slippers?” Your question is, “What happens to these slippers during Mom’s actual night trip?”
Walk the six stops in order
Stay close enough to observe, but do not turn this into a balance test. If she would not normally walk safely without another person, do not ask her to demonstrate alone.
Stop one, the bed edge: Watch how she gets each foot into the slipper. Does the heel enter fully? Does she step on the back? Does she use her toes to pull the slipper toward her? Check whether one slipper starts farther under the bed or points away from her.
Stop two, the stand: Watch the first moment after her feet take weight. Does either slipper move while her foot stays still? Does the heel rise out? Does the sole buckle at the toes? Does she pause to shuffle a slipper back into place before taking a step?
Stop three, the bedroom path: Listen as well as look. A repeated scrape can show that she is not clearing one foot. A sudden quiet step can mean a slipper has partly come off. Notice whether she shortens one step, kicks forward to reseat the slipper, or reaches for furniture at the same moment.
Stop four, the doorway: Look at the floor change. The bedroom and bathroom may have different surfaces, a threshold, or a narrow turn. Does the front of a slipper catch? Does the sole slide as she changes direction? Does one slipper rotate on her foot?
Stop five, the toilet turn: Watch both feet through the whole turn. One may pivot while the slipper stays planted. One heel may step onto the other slipper. If she has to kick a slipper aside before sitting, the footwear is part of the transfer problem.
Stop six, the return to bed: Repeat the same observations. Do not assume the return is identical. She may be sleepier, moving faster, or approaching the bed from a different angle. Check whether each slipper is still fully on when she reaches the bed edge.
How to tell you have a footwear problem
Treat the slippers as part of the problem when you see the same mismatch more than once: her foot moves inside the slipper, the slipper moves without her foot, the heel repeatedly comes out, the upper folds under, or the sole catches or slides at a particular stop.
Also notice correction moves. Kicking forward, curling the toes, widening one step, stopping to reseat a heel, or reaching suddenly for support may be how she keeps a loose slipper with her. Write down the correction instead of calling the walk “unsteady.”
If the slipper stays aligned but her foot drags, her ankle gives way, she becomes dizzy, she has pain, or her walking has changed, do not solve that by changing footwear alone. Tell her physician what you observed and ask what should be assessed.
What to do before morning
If a slipper is folding, twisting, catching, or coming off, take that pair out of the night route. Do not improvise by tightening it with tape, stuffing material into it, or adding a loose insert.
Use only an alternative she already wears safely and can put on without leaning or struggling. Then watch that alternative at all six stops. A shoe that stays on but makes the toilet turn harder has not solved the whole trip.
If there is no familiar alternative you can observe safely, do not run a new walking experiment at 3am. Keep the route lit, stay with her if that is already the safe plan, and postpone the comparison until she is rested.
What to write down
Use one line for each trip. Record the time, which footwear she wore, and what happened at each stop. Use plain descriptions:
“Left heel came out when she stood.”
“Right toe caught at bathroom threshold.”
“She kicked both feet forward before the toilet turn.”
“Slippers stayed on going out, but the left one twisted on the return.”
Also record whether the problem happened barefoot, in another familiar pair, or only in these slippers. Do not write “bad balance” when you can write the movement you saw.
What to ask before you replace anything
Bring the notes and the actual slippers to her next appropriate appointment. Ask her physician whether the change in walking, foot placement, pain, sensation, swelling, or strength needs evaluation. If she already works with a physical therapist, occupational therapist, podiatrist, or other clinician, ask which features should fit her feet and her way of walking.
When comparing another pair, check the same things in the same order: whether she can put them on without leaning, whether her heel stays in, whether the sole bends or catches, whether the pair fits both floor surfaces, and whether she can complete the doorway and toilet turns without a correction move.
The useful answer is not a label on the footwear. It is a clean six-stop observation: the slipper stays with her foot, her foot clears the floor, and she does not have to change her movement to keep the slipper on.