Frequently Asked Questions

Below you will find an overview of frequently asked questions. If your question is not listed, please do not hesitate to contact us! Navigate directly to: - Shipping & payment - Exchanges and returns - Questions Mermaid Tail - Mermaid Tail manual - Questions AirTrack - Contact

Shipping and payment

What are the shipping costs? Shipping within the Netherlands and to Belgium is free. For other countries, please contact us in advance. What is the delivery time? Orders for mermaid tails ) and Airtracks are normally delivered to you within 2 working days by GLS. If a product is not in stock, it will be clearly indicated with the product when new stock will arrive and whether products from that new stock can still be reserved. Shipments to Belgium may take one day longer. How can I pay? You can pay with us via
  • iDeal
  • Bank transfer
  • Bancontact
  • Immediately
  • Credit card (Visa, MasterCard, American Express)
We do not charge any additional payment costs. Can I pick up an order from you? Due to the situation surrounding corona, we currently do not offer the option to pick up. Of course, you always have the option to return within 30 days of receipt.

Exchanges and returns

How much warranty do you give? We deliver high-quality mermaid tails and Airtracks at an affordable price. The prices speak for themselves and the quality is reflected in our warranty. Our mermaid tails come with a 12-month warranty. Our Airtrack collection comes with a 2-year warranty. Excluded from this warranty are wear and physical damage. If in doubt, always contact us. Can I exchange my product? You can always exchange a product within 30 days of receipt. However, for mermaid tails, this is only possible if you have not yet swum with them. For AirTracks, it applies that they must still be in new condition. Please contact us in advance to discuss an exchange. I want to return my order and get my money back, how do I do that? You always have the right to return your order within 14 days of receipt and get your money back. However, for mermaid tails, this is only possible if you have not yet swum with them. AirTracks must be in new condition. Before returning, always contact us for a return number. I received my product damaged, what should I do? We check the products for damage both in the factory and in our warehouse. If we miss something, we will of course resolve this with you immediately. Check immediately upon receipt of your order for damage. If this is the case, please let us know within 3 days of receipt. I still want to make an adjustment to my order, is that still possible? If you have not yet received confirmation that we have shipped your order, you can always make an adjustment to your order.


Other questions about the AirTrack

What is the difference between the old Airtracks collection and the new model? For the new collection, we looked at how we could make our Airtracks even better in all areas. We therefore made the side of thicker PVC to extend the lifespan. The suspension has been improved by using even better "double wall fabric", the core of the Airtrack. And we looked at how we could make the Airtrack even more beautiful. For this, we switched to a new production method that is also used by top brands in the SUP industry. This method ensures a better finish. An additional advantage is that the connection of the various parts has become much stronger, which means we can now give a 2-year warranty. Ultimately, we looked for a way to implement all these improvements and still make the price more accessible so that more kids and adults can enjoy the many benefits of an Airtrack . The solution for this was found in a collaboration with 3 other serious suppliers of Airtracks that are active in other countries. Through this collaboration, we can significantly reduce the cost price of the Airtracks, which in turn has a positive effect on the prices. There are many suppliers for AirTracks, how do I choose the right one? Always check the company where you want to buy. There are a number of companies active in the Netherlands that have been around for years and where you can therefore safely order. However, there are also a few suppliers that are not clear about, for example, the delivery time or that have it shipped directly from Chinese sales platforms, which means that you still have to pay VAT and import duties upon receipt and cannot claim any warranty. Therefore, always check in advance how long the website has been around (www.sidn.nl) and whether they have real reviews on, for example, Google, Facebook or Trustpilot. Reviews on your own site say little, anyone can put them there. What about the delivery time on the AirTracks? Look at the description of the AirTrack in question. This clearly states whether the AirTrack is in stock. If this is not the case, it will state the next date on which new stock will arrive and whether there are still AirTracks available from that stock. You then have the choice to place your order now, which guarantees your reservation, or to wait until the specified date and order at that time. Why are your AirTracks cheaper than many other suppliers? We get this question very often. We like to turn the question around, "why are they so expensive?" ;-) The production of AirTracks is becoming more and more affordable. Yet many suppliers still stick to the old price level. Some still work with an older and more expensive production process, which means they have to keep the prices high. In addition, there are also suppliers who can deliver cheaper but choose a higher profit because many people are still willing to pay their high prices. Just like we have been doing for a number of years with the mermaid tails, we choose to deliver high quality AirTracks for an affordable price. Are your AirTracks waterproof? Yes, they are! So you can use the AirTrack on the water without any problems. Is there a difference between the front and back of the AirTrack? Yes. All Airtracks are equipped with Velcro on 1 side. This allows you to attach an extra AirTrack, for example. The other side is equipped with a line across the middle.


Other questions about the mermaid tail

When can my child swim with a mermaid tail? We recommend that children only swim with a mermaid tail when they have obtained their A and B diplomas. In addition, there must always be adult supervision. How can I maintain my mermaid tail? The best way to properly maintain your mermaid tail is to rinse it with cold water after swimming and let it dry thoroughly before storing it away. You can put it in the washing machine on a cold setting, but this will affect its lifespan. How do I put the tail on? The easiest way to put the tail on is when it is dry and your feet are wet. Roll the tail all the way up until you see the black fin. Sit on the edge of the pool and then place your feet in the monofin and roll the tail up over your legs as far as possible. You can do the last part while jumping into the pool. I would like to order a number of tails for my swimming school, what are the options? Please contact us for this. What shoe size are the monofins for? The tails in sizes 6 to 12 are supplied with a monofin that is suitable for sizes 31 to 38. From size XS, the tails are supplied with a monofin that is suitable for sizes 35 and larger. How do I choose the right size? Use our handy size chart to determine which size Mermaid tail is best for you. If you are unsure about the size, you can always contact us! More information can be found on the page " Mermaid tail which size ". Can I also order a separate mermaid tail? If you already have a Mermaid Sisters monofin and would like an extra, larger or new model mermaid tail, that is possible. In that case, please contact us for the possibilities. Can I also order a separate monofin? Yes, of course, you can find them on this page.