Every Pai-Shau wash product at ProHair now comes in the same three sizes, and the two wash rituals are also sold as shampoo-and-conditioner duos. This guide explains which size makes sense for you, when a duo is the better buy, and what the litre pump is for.
The three wash sizes
The four wash products — Replenishing Hair Cleanser, Replenishing Cream Conditioner, Volumizing Shampoo and Opulent Volume Conditioner — each come in 90 ml, 250 ml and 1 L. The formula is identical in every size; only the bottle changes.
- 90 ml travel bottle — the way to try a ritual before committing, and the size that goes through airport security in a carry-on.
- 250 ml bottle — the everyday home size for one person washing a few times a week.
- 1 L pump bottle — the lowest cost per wash. It suits a shared family shower, anyone washing daily, and a salon back bar.
When to buy a duo
If you already know you will use the shampoo and its conditioner together, the duo costs 2.5% less than buying the two bottles separately. There are two:
- Replenishing duo — the Hydrating Ritual cleanser and cream conditioner for dry, dull or tangle-prone hair.
- Volume duo — Volumizing Shampoo and Opulent Volume Conditioner for fine, flat hair.
Each duo comes as a 250 ml pair or a 1 L pair. There is no 90 ml duo: at travel size the saving is too small to matter, so buy the minis on their own.
The litre pump
The 1 L bottles are heavy to tip in the shower. The Pai-Shau Liter Pump screws onto any Pai-Shau litre bottle so you can dose with one hand. One pump moves from bottle to bottle, so you only need one per bottle you keep open.
Minis beyond the wash
Three finishing and treatment products also have a small size: the Supreme Revitalizing Mask in a 50 ml tube (as well as the 280 ml jar), and both hairsprays — Sublime Hold and Imperial Hold — in a 50 ml mini beside the 280 g can. The minis are sized for a handbag, a gym bag or a weekend away.
Quick decision guide
- Trying Pai-Shau for the first time → 90 ml of the shampoo and conditioner for your hair type
- You use both steps at every wash → a duo, 250 ml for one person
- A family shares one shower, or you wash daily → the 1 L duo plus a litre pump
- Salon back bar → 1 L bottles with pumps
- Touch-ups on the go → the 50 ml hairspray minis
FAQ
Is the formula different in the litre bottle?
No. The 90 ml, 250 ml and 1 L bottles carry the same formula; the litre bottle simply comes with a pump top.
Can I mix a Replenishing shampoo with a Volume conditioner?
Yes, if your hair is dry at the ends but flat at the roots. The duos are the matched pairs; mixing lines simply means buying the two bottles separately.
Why does the duo price change?
A duo is always priced at 2.5% below its two bottles bought separately, so if either bottle's price moves, the duo moves with it.
See every size side by side on the Pai-Shau collection page, or read the complete Pai-Shau buying guide.