Frequently Asked Questions

Yes! Every Mäertin formula is crafted to be gentle yer effective, making them safe for color - treated, keratin - treated, and chemically - processed hair.

Mäertin is stylist - formulated with clean, high performance ingredients - no fillers, no fluff. We prioritize results you can see and feel, without compromising hair health or ingredient integrity.

Yes. All Mäertin products are free from sulfates, parabens, phthalates, harsh drying agents. We focus on nourishing, effective ingredients that support scalp and strand health.

Many customers will notice a difference in softness, manageability, and shine after just one use. Deeper repair and strength build with consistent use over time.

Never. Mäertin is proudly cruelty-free and committed to ethical sourcing and testing practices.

We offer several shipping options to meet your needs. Standard shipping typically takes 3-5 business days and is free on orders over $79. Additional shipping options are shown at checkout with Shopify and are based on current USPS rates. International shipping is available to select countries with delivery times ranging from 7-14 business days depending on location. Please note that shipping times may be affected during holiday periods or due to extreme weather conditions.

We want you to love your Mäertin products, so we offer a 30-day satisfaction guarantee. If you're not completely satisfied with your purchase, you may return unopened products in their original packaging within 30 days of delivery for a full refund. For opened products, we offer a one-time courtesy return per customer if the product doesn't meet your expectations. Simply contact our customer service team to initiate the return process. Please note that shipping costs are non-refundable unless the return is due to our error.

Yes, we currently ship to over 45 countries worldwide. International orders typically take 7-14 business days to arrive depending on the destination and local customs processing times. Please note that international customers may be responsible for customs duties, taxes, and handling fees charged by their country's customs authority. These fees are not collected by Mäertin and are the customer's responsibility. For a complete list of countries we ship to, please visit our International Shipping page.

Once your order ships, you'll receive an email with tracking information. You can click the tracking number in that email to see real-time updates on your package's journey. Additionally, if you created an account during checkout, you can log in to view your order status and tracking details at any time. If you have any questions about your order or if you haven't received tracking information within 2 business days of your order (excluding weekends and holidays), please contact our customer service team.

For optimal results, apply the Intensive Repair Mask to clean, towel-dried hair. Start by dividing your hair into sections and apply a generous amount from mid-lengths to ends, using a wide-tooth comb to ensure even distribution. For extremely damaged hair, apply a small amount to the roots as well. Leave the mask on for 10-15 minutes (or up to 30 minutes for an intensive treatment). For enhanced penetration, cover your hair with a shower cap and apply gentle heat with a blow dryer for 5 minutes. Rinse thoroughly with warm water. For severely damaged hair, we recommend using the mask twice weekly initially, then reducing to weekly maintenance once you see improvement.

Absolutely! Our products are designed to work synergistically. For a complete hair care routine, we recommend using our sulfate-free shampoo followed by our daily conditioner. Once or twice a week, substitute the daily conditioner with the Intensive Repair Mask. After towel-drying your hair, apply a few drops of the Hydration Revival Serum to damp hair before styling. For heat protection, use our Thermal Shield Spray prior to using hot tools. If your hair is severely damaged, the Bond Restoring Treatment can be used once weekly before shampoo as a pre-treatment step. These combinations will provide comprehensive care for your hair.

Many customers report noticeable improvements after just one use, particularly with the Intensive Repair Mask and Hydration Revival Serum. However, for long-lasting transformation, consistent use is key. Typically, you'll see significant improvements within 2-3 weeks of regular use. For severely damaged hair, it may take 4-6 weeks to achieve dramatic results. Remember that hair health is a journey, not an overnight fix—our products work to improve the actual condition of your hair over time, not just mask problems temporarily. For best results, use Mäertin products consistently as part of your regular hair care routine.

The amount varies by product and hair length/thickness. For the Intensive Repair Mask, use a quarter-sized amount for shoulder-length hair, increasing for longer or thicker hair. For the Hydration Revival Serum, 2-3 drops are sufficient for fine/short hair, 4-5 for medium length, and 6-8 for long/thick hair. With the Bond Restoring Treatment, use about a tablespoon for shoulder-length hair. Our products are concentrated formulas that go a long way—using more product than recommended won't speed up results and may weigh hair down. Start with the suggested amount and adjust based on your hair's needs.

All Mäertin products are 100% cruelty-free—we never test on animals and do not sell in markets that require animal testing. Most of our products are vegan and gluten free, with the exception of our Intensive Repair Mask, which contains ethically-sourced honey and keratin. We clearly label which products are vegan on both our website and packaging. We're committed to ethical practices and are continuously working to develop fully vegan alternatives for our entire product line without compromising on efficacy.

We maintain a strict "no" list of ingredients we refuse to use in our formulations. This includes sulfates (SLS/SLES), parabens, phthalates, formaldehyde, formaldehyde-releasing agents, mineral oil, retinyl palmitate, oxybenzone, coal tar, hydroquinone, triclosan, triclocarban, and synthetic fragrances. We believe these ingredients have no place in premium hair care and may contribute to scalp irritation, hair damage, or environmental concerns. Instead, we focus on plant-based, effective ingredients that deliver results without compromising hair health or environmental sustainability.

Our products feature scientifically-proven ingredients selected for their efficacy. Key ingredients include hydrolyzed keratin (strengthens and repairs), hyaluronic acid (hydrates and plumps), plant-derived ceramides (restores hair's protective barrier), argan oil (nourishes and adds shine), bond-building technology (repairs broken disulfide bonds), panthenol (thickens and hydrates), and biotin (promotes healthy hair growth). We also incorporate botanical extracts like aloe vera, avocado oil, and rosemary extract for their healing and protective properties. Each ingredient is carefully selected and precisely formulated to address specific hair concerns while working harmoniously with other ingredients.

We formulate our products to be gentle and non-irritating. We avoid common irritants like sulfates, artificial fragrances, and harsh preservatives that can trigger sensitivity. Our products are dermatologist-tested and safe for sensitive scalps. That said, individual sensitivities vary, so we always recommend checking the ingredient list if you have specific allergies. For extremely sensitive skin, our Gentle Restore Collection is specifically formulated with minimal ingredients and extra soothing properties. If you experience any adverse reaction, discontinue use immediately and consult with a healthcare professional.

We're committed to responsible sourcing practices that prioritize quality, sustainability, and ethics. Whenever possible, we source organic, fair-trade ingredients from trusted suppliers who share our values. Our botanical ingredients are harvested at peak potency to ensure maximum effectiveness. We work directly with sustainable farmers for key ingredients like argan oil and shea butter, ensuring fair compensation and environmentally responsible production methods. We're transparent about our supply chain and continuously work to improve our sourcing practices, with the goal of achieving 100% traceable ingredients across all products by 2025.