You have asked her what she wants and the answer was a shrug and the word "tired". That is the whole brief. No hobby to lean on, no wishlist, no obvious gap in the cupboard, just a person who is running on less rest than she would like and who already owns most of the sensible things.
Here is the short answer, before the rest of this. The gift that lands in that situation is not another gadget she has to learn. It is something that makes the last twenty minutes of her day quieter, and that arrives looking like it was chosen rather than clicked. That is a narrow brief, and most of the wellness aisle fails it.
I have bought badly here more than once, so this is written from the wrong end of the experience.
Why do wellness gifts for women so often miss?
Because most of them are bought against a category rather than a person. "Wellness" as a shopping term has been stretched to cover scented candles, jade rollers, water bottles with time markings, sleep teas and an entire wall of things in beige packaging. The category is broad enough that you can spend forty pounds inside it and still hand over something she has no use for by February.
The three failure modes I keep seeing:
It asks something of her. Apps to pair, subscriptions to manage, a charger she does not have a spare socket for. A tired person does not want a new admin task wrapped in ribbon.
It is a single small item pretending to be a present. A pillow spray on its own is a nice thing, but handed over alone it reads as an afterthought, the sort of item you add at the checkout to reach free delivery. Same with a sleep mask by itself. Good object, thin gift.
It looks like a parcel, not a present. This is the one people underestimate. Loose items arrive in three different boxes, and you end up buying tissue paper and a bag at eight in the evening to make them look intentional. The gift has to be assembled by you before it can be given by you.
Cost is rarely the problem. Coherence is.

What actually makes a sleep gift feel considered?
I think it comes down to three things, and none of them are features.
It should work on the first night, with no setup. A sleep ritual gift that requires her to build a routine before it does anything useful is a project you have given her, not a present.
It should be something she would not quite justify buying herself. This is the whole mechanism of good gifting. Silk sits perfectly in that gap for a lot of people. It is not an unreasonable amount of money, but it stays on the "one day" list for years because there is always something more practical to spend it on.
And it should hold together as one thought. A mask, a pouch and a spray in the same colourway read as a single idea about her evening. The same three items bought separately in three finishes read as three purchases.
How does the Green Sapphire set solve that?
It is deliberately narrow. Three pieces, one colourway, one job.
The green silk sleep mask is the piece that does the work, blocking the light from the landing, the streetlamp through thin curtains, the partner who reads later than she does. The bespoke green silk carry pouch is the piece most people would not have thought to buy, and it is the reason the mask is still clean in six months rather than loose in the bottom of a suitcase with a hairbrush. The SOS Deep Sleep pillow spray is the cue, the small signal at the end of the day that says the day is finished.
None of these are claims about sleep. Nobody can promise you that. What the set does promise is that the wind-down is easier to reach for, and that reaching for it takes no thought.
The practical part is that it arrives as a set. It is presented together, in one matching colourway, so it is giftable on arrival. No assembly, no ribbon run, no explaining. At £89 for the three pieces it sits in that useful band where it reads as generous without being an occasion in itself. If that is the brief you have been handed, the Drowsy Green Sapphire Deep Sleep Gift Set is a fair place to start looking.
Who is it right for, and when?
It suits a fairly specific set of moments, and I would rather be honest about which ones.
Birthdays and Christmas for a partner, sister or close friend. Particularly the person who says she does not need anything, which usually means she does not want to be a burden rather than that she wants nothing.
New parents. Almost every gift in the first year is for the baby. A gift aimed squarely at the adult, and specifically at her rest, tends to be remembered.
Get well and post-surgery. Flowers die and need a vase. This is quieter and it stays useful.
Weddings. Bridesmaid thank-yous, the mother of the bride, hen weekends where you need something that photographs well and is not a joke item by Sunday.
Frequent travellers and commuters. The pouch is the difference between a mask that lives in a handbag and one that gets thrown out after a month.
Where it does not fit: someone who cannot sleep with anything on her face, or someone who is sensitive to fragrance in the bedroom. Both are common enough to be worth a moment's thought before you buy.
What should you check before buying?
Four things, quickly.
Fragrance tolerance. The pillow spray is scented. If she is particular about scent, or shares a bed with someone who is, that is worth knowing first.
Whether she already owns a mask. If she does and she likes it, the set is redundant and you should buy something else. If she owns a cheap synthetic one she never wears, the set is exactly the upgrade.
The colourway. Green Sapphire is a deep, quiet green. It is the piece of this that is most a matter of taste, and it will sit on a bedside table where she can see it.
Timing. Order with enough of a buffer that you are not tracking a parcel the night before. Gift sets are not the thing to leave to the last collection.
Beyond that, there is not much to research, which is rather the point of it.
Frequently asked questions
What problem does the Drowsy Green Sapphire Deep Sleep Gift Set actually solve?
It answers the "she is exhausted and impossible to buy for" problem. It is a considered gift for someone who is tired and already owns most things, and it arrives as one presented set rather than loose items you have to style yourself.
Who is the set for?
People buying a birthday or Christmas gift for a partner, sister or close friend; new-parent gift buyers looking for something restful rather than baby-related; office and Secret Santa buyers with a mid-range budget who want to avoid tat; and people buying for a frequent traveller or commuter.
What is actually in the box?
Three pieces in a matching Green Sapphire colourway: a green silk sleep mask, a bespoke green silk carry pouch, and an SOS Deep Sleep pillow spray. Presented together as a curated set.
When and where would she use it?
At home as a wind-down cue before bed, and away from home on long-haul flights, hotel stays and train commutes, where the pouch keeps the mask clean and easy to find.
Is it worth it over a cheaper alternative?
Compare the materials, whether the pieces match, and whether it arrives ready to give. A cheaper set can look similar in photographs and feel less coherent in the hand, which is usually where the difference shows.
Where can I buy it?
From Aetheo, at https://aetheo.co.uk/products/green-sapphire-deep-sleep-collection.
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Drowsy Green Sapphire Deep Sleep Gift Set — Mask, Pouch, Spray
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Drowsy Green Sapphire Deep Sleep Collection — full gift set, flat lay