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  • What is a cold saponification reaction?
    It is quite simply a chemical reaction that takes place between a fatty substance (which can be an oil, butter, etc.) and an alkaline solution (i.e. a strong base). At the end of this reaction, we obtain a paste which will be put into a mold and left to rest for a few hours or a few days. Then the bar of soap is unmolded and cut into soaps which are placed in “cure” for a period of between 4 and 8 weeks. This cure allows the soap to dry out, i.e. to lose water and therefore harden. The cold saponified soap obtained is surgras because at the end of the saponification reaction there will remain the unsaponified oils and butters constituting this surgras which will nourish and soften the skin. The cold saponification process therefore requires no cooking, which is why it preserves all the benefits of the oils and/or butters. It also makes it possible to preserve the vegetable glycerin formed naturally during the saponification reaction. This vegetable glycerin has a very important role in skin care. It has moisturizing properties and a strong ability to retain water. Thus, the combined action of surgras and glycerin nourishes the skin and protects its hydrolipidic film.
  • How to use the soaps?
    Pass the soap under water to moisten it, lather by applying it to the whole body and/or face, then rinse.
  • How to store soaps?
    To prevent the soap from melting prematurely, please put it on a soap dish away from water splashes so that it can drain and dry well after each use. We recommend that you preferably take it out of the shower and keep it dry after use. Avoid leaving it under water, or in an unperforated dish.
  • Are our soaps suitable for sensitive skin ?
    Bosten soaps are formulated to suit sensitive and/or problem skin. Their composition is balanced and adjusted so that the soap is very gentle on the skin.
  • Are our soaps biodegradable ?
    Bostèn soaps are completely biodegradable. During our manufacturing process, we take care not to reject anything in nature, not to pollute groundwater, to use little water for manufacturing and to adopt recyclable kraft paper packaging.
  • Are our soaps vegan ?
    Bosten soaps are not tested on animals. They are VEGAN, as no material of animal origin is used in the manufacturing process.
  • Where does the name bosten come from?
    I chose this name for my brand because it has sentimental value to me. It corresponds to the name of our family home which reminds me of all my childhood memories. bostèn is an Arabic word (from Persian بوستان, bûstān “garden”) meaning orchard or garden. Find out more about our story here >>
  • Where are our soaps made?
    All our raw materials and all our manufacturing processes are MADE IN TUNISIA. The majority of our activity is mainly done in the Cap-Bon region of Tunisia. This region is located on the coastal zone and it is where I lived all my childhood and my adolescence 😊 To discover this journey in childhood c it's over here >> Our cooperatives of women who distil floral waters and those who make soaps are located in rural areas and do everything by hand in an artisanal way that meets ancestral know-how. Find out more about this craftsmanship here >>
  • What is the delivery delay ?
    We send all our parcels by post. For delivery in France, it takes between 2 and 5 working days from the date of your order. For international delivery, it takes between 4 and 8 working days from the date of your order. Please note that in this case, certain charges (administrative and/or customs fees) may be applied to you by the carrier.
  • Are there delivery charges  ?
    For all orders in Metropolitan France, the shipping costs applied are calculated according to the destination postal code. Delivery options are updated upon checkout. For other destinations the costs are calculated according to the country of delivery.
  • How can I track my order?
    Upon receipt of your order, a confirmation email will be sent to you. You will then receive an email informing you of its shipment with the tracking number and the link to the La Poste website where to follow its delivery.
  • Can we make an exchange or a return?
    In the event of a problem with your order or for any exchange or return request, write us a short email at including your order number. We promise to get back to you as soon as possible and find a solution together! NB: Returns or exchanges are possible within 15 days of receipt of the package, and are limited by available stocks. We reserve the right to refuse the right of return or exchange if the article has been used or started.
  • Is it possible to have it delivered by hand?
    The delivery of your package by hand is possible if the delivery address is Paris intramural. As soon as you place your order on our site, we will contact you by email or SMS to deliver it in person to the available slots. 🥰As bostèn is a young brand, meeting our customers is essential for the sustainability of the brand and that makes us especially happy!
  • How to be aware of your pop-up stores?
    Just subscribe to our Instagram account @bostenparis< /strong> where you can find our news and events 😊
  • What means of payment do you accept?
    We accept Visa, MasterCard and American Express. You can also finalize your order with Paypal.
  • Are payments secure?
    Payments are secured with the 3D secure system.
  • Do you save my bank details?
    Absolutely not! Your bank details are transmitted to the payment manager which we cannot access.
  • How to request an invoice ?
    If you wish to receive an invoice, please write to us at by indicating the number of your order and we will send you an invoice within 2 working days maximum.
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