Solid shampoo / hair soap

One solid bar replaces two to three plastic bottles of liquid shampoo and is travel-friendly and economical too. It comes on a soap base (natural) or as a pH-skin-neutral syndet bar. Which one suits you depends on your hair and water hardness, and an acidic rinse helps during the switch. Dry it in a pouch or on a dish, then it lasts especially long.

If you want to buy it

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What matters

With care, tolerance counts. Look for pure natural oils instead of mineral oil and for clearly legible ingredients (NATRUE/COSMOS labels help). Less, but the right thing, is almost always better for the skin.