I have used 3 (beige, white efficient and tsuya) out the 5 available UV under base mousse and will attempt to summarise the differences between the 3 in this review.

Beige is a very light beige foam and looks the most natural on skin with yellow undertones. There is minimal tint, in fact I'd say it is pretty much sheer so unless you have really good skin, I wouldn't bank on using just this for coverage. As it contains witch hazel it should help with pores and oil control. I have oily-combo skin and personally find that it does minimise my pores and controls oil somewhat. It applies evenly and dries to a nice smooth finish which feels very slightly powdery to the touch.

White efficient (purple) is a very light purple foam which is supposed to even out the yellowness in yellow skin tones resulting in a brightened skin tone. I'm a NC20 and this leaves a very slight purple-white cast immediately after application. It shouldn't be an issue if you're going to use foundation over this but if you are planning to wear it alone, it may not look natural for anyone darker than NC/NW20. Like the beige mousse, this also blends well into the skin (no streaks) and dries to a nice smooth finish.

Tsuya skin is the latest offering and is a peach tone foam which is a tad darker than beige. It is supposedly more moisturising and is therefore thicker/heavier than the usual mousses. I personally find this one difficult to work with. It is much harder to apply (streaks galore!) and instead of blending into the skin, it seems to form a film over the skin. The finish also differs to the regular mousses in that it dries to a tacky, slightly sticky finish. What I found the most frustrating is that if you rub your face, the film starts to flake off in these little peach peels which is really unsightly. You're supposed to use less mousse with the tsuya version and I did try this but still experienced the same problems with the finish and peeling. The tint in this one is also the strongest of the lot and unfortunately oxidises on oily skin. On me, it turned a slightly rusty colour on my T zone which is the oiliest part of my face. Also, for those sensitive to fragrance, the light floral scent that all the mousses have is also the strongest in this version.

In summary, I'd personally stick to the regular mousses. I tend to wear these alone over moisturiser and so would only use the white efficient in winter when I'm at my fairest (NC15-20) and the beige for the rest of the year. I intend to try the pink one next as I'm hoping it'll provide a more natural brightening effect that the white efficient version. Will update when I've tested it out!

Finally, a quick note on the sunscreen component - I wore this everyday on top of my spf15 moisturiser in the middle of summer in Japan where I was outdoors most of the time and I did not burn let alone tan.

One of my holy grail, desert island products. I have beige and the brightening pink/purple. Shu's UV Underbase Mousse is like the Witness Protection Program for pores. I don't even wear foundation over this; I just powder and go. Pores are near-impossible to find after that. I love the high SPF. The tacky (but light... weird) finish is a dealbreaker for some, but I find that the finish becomes powdery and light as it sets. Inevitably, my first dollop of a new canister is too much, and the suggested dose of "ping pong" is far too much, but by applying just the slightest pressure, I am quickly able to get into the grove of small foamy blobs. I am NW5 so neither mousse is too pale for me. The brightening one in particular is lovely.

I don't understand why this product gets so many good reviews around the web. It looks like a great concept and the online tutorials made me salivate. I love a light textured mousse. The SPF and skin evening qualities sounded like wonderful bonuses. Unfortunately, I didn't like it on, at all. Which is sad because I love Shu Uemura and have been using their products for 25 years.

I didn't like that the product left my skin looking ashen. It's not necessarily too light, but there's something ghostly about it's tone. The worst thing is that it went on sticky. Not smooth and wet to powdery dry, but wet to sticky. With a ghostly ashen after[non]glow. I looked blood drained by a vampire, and I dare not touch my face for fear of having my hand permanently stuck to my skin.

Packaging is on the lame end of the spectrum, for a global high end brand like Shu. It feels more drugstore than department store. I haven't had too much trouble with the nozzle but you have to be very careful about not dispensing too much as it's easy to do.

Sorry, this was not for me.

I have so much of this product it's ridiculous! There's about 6 cans in my collection including their new BB mousse formula. Love it to bits and won't go anywhere without it as it's the perfect cover up before any powder. You can even use it on its own when you don't want to use anything else but mascara and lipstick.

This is my HG base before putting on any make up! I have the one in Beige and it corrects my skin tone. However, this is very sheer coverage so don't expect any form of cover up for your blemishes, acne, etc. Despite the sheer coverage, it is up till now, the best base that I have ever used!

I bought this product thinking that it would make my face less 'shiny' during the humid London weather. However, it didn't do anything to take the 'shine' away from my face. More so my face looked pale and dull with the Beige tint. I was showed how to apply and it felt like i was wasting half of the product being absorb on the sponge. The price was pricey too for what it is.
As for working as a primer - it did nothing to make my make up stay.

Good = felt light, SPF protection
Bad = made my face dull, can be messy to apply, did nothing to make the make up stay

I bought this in beige and the whitening (purple can). After a few weeks of use, I very much prefer the beige mousse although the whitening formula does a great job of brightening up my complexion. The beige mousse on the other hand evens out the whole skin tone very naturally and if I'm feeling a little lazy, I will skip even the foundation and just pat on my loose powder. The mousse formula, although it liquefies when I dab my finger into it, is very light and easy to spread on the face. Just a small dollop of mousse is sufficient for the whole face and it does a brilliant job of keeping my makeup on throughout the day.

I read a lot of reviews on the difficulties of dispensing the mousse.... Perhaps I'm lucky with my bottle, but I find it ok to control. I just need to depress it lightly (literally just a light dip) and a nice little dollop is dispensed.

Mine is the UV Under Base BB Mousse SPF 30, this was an impulse purchase, without research. What a mistake !!
Under the warm lighting in the store, everything looks good on the skin, of all 3 mousse, the BB mousse matches my skin colour the best.
I really don't find any pros in this product; here are the cons:
- despite of moisturizer underneath, it makes my skin looks & feel dry
- no colour selection, all these BB stuff carries a greyish cast, on my warm skintone NW 25 - 30, it just look so ridiculous.
- as with all these mousse foundation, it sits as liquid in a compressed container (can), addition propellent has to be added, in this case, there is propane in the list, in order to reject the product through an aerated nozzle to turn it into a soft cuddley mousse. This is immediately blended, turning it back into a liquid ...... isn't that ridiculous. continued >>

The pump is a disaster. I have to squeeze very very gently but despite controlling the light pressure I put on the pump, a huge lump of mousse comes out sometimes. Thus, a lot of it was wasted.

The mousse is drying. It makes my skin looks dehydrated despite putting a moisturiser.

It is also hard to spread on my face.

This is my daily essential before I apply on any BB cream or tinted moisture or foundation.
It is very light which I will recommand, however, because it is so light, it doesn't provide much coverage.
It has SPF30 and that's enough SPF you need for daily use, unless you are going to the beach, sunscreen product with higher SPF are usually heavy and oily....but this under base is probably the lightest product provides SPF 30+
I also found if I apply this before powder foundation, it will gives a more brighten look than without it which is good when you want a light and flawless finish.
For the price part, I have to say it is a little bit pricy, but Shu Uemura is kind of high end brand, and I didn't find any substitution for this product... I will keep buying it.