# Monofin Master Mermaid swim monofin, Master MAS-B631 (violet) — training and recreational use

**URL:** https://aio.lv/en/product--master-mas-b631-violet--11971994
**Data updated:** 2026-03-11 16:02 (EET)
**Category:** Sports & Fitness Products
**Manufacturer:** Master
**Manufacturer code:** MAS-B631-violet
**EAN:** 8592833010254
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 16.49 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 13.63 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--master-mas-b631-violet--11971994

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 08.07.2026 | free |
| Pickup points | 13.07.2026 | 1.99 EUR |
| Courier delivery to door | 13.07.2026 | 4.99 EUR |

## Summary description

Monofin Master Mermaid MAS-B631 is a swim monofin designed for mermaid-style swimming, training and recreational use. Supplied in violet, it combines a single blade with foot pockets to enable dolphin-like kicks, improve leg strength and technique, and support aquatic performance and choreography in pools and calm open water.

## Long description

Monofin Master Mermaid swim monofin MAS-B631 in violet is a single-blade swim fin designed for mermaid-style swimming, training and recreational use. The monofin combines a wide blade with integrated foot pockets to enable fluid dolphin-style kicks, helping swimmers develop leg strength, timing and undulation technique. It is intended for use in pools and in calm open water where controlled practice of breath-hold, choreography and surface or near-surface propulsion is required.
Advantages
The Master Mermaid monofin offers a compact, ergonomic foot pocket and a flexible blade profile that transfers leg motion into efficient forward thrust. Its construction balances drive and maneuverability to support both beginners and intermediate swimmers. The violet color provides clear visual identification during group lessons or aquatic performances, while the durable materials resist chlorine and regular pool use when rinsed and stored properly.
Suitable for
Mermaid-style swimming practice and choreography
Technique training for dolphin kicks and body undulation
Recreational swimming in pools and calm open water
Strength and endurance exercises for legs and core
Key specifications
Single-blade design with integrated foot pockets for both feet
Flexible blade profile optimized for smooth undulation
Ergonomic foot pocket for secure fit and even power transfer
Intended for pool and calm open-water use
Violet color for visibility
How to use
Fit both feet into the foot pockets and adjust body position so that the blade sits horizontally behind the swimmer. Use controlled dolphin-like kicks generated from the hips and core, maintaining a steady rhythm and long, smooth strokes. Start with short sets at low intensity to adapt to the monofin, then gradually increase distance and session duration as technique and comfort improve. When practicing choreography, coordinate arm movements and breath timing with fin-driven propulsion.
Usage recommendations
Rinse the monofin in fresh water after each use and store it away from direct sunlight. Use the monofin in supervised or familiar water conditions and begin with short training intervals to reduce muscle strain. Choose appropriate pool depths and avoid areas with strong currents or heavy boat traffic when using the monofin in open water.

## FAQ

### How much does the Monofin Master Mermaid MAS-B631 (violet) cost, and is it available for purchase?

The price is 16.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 101 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 08.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Master products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Master service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11971994/67419223_large.webp