With MASTA FROST and MASTA ROUNDA , Seven Bass Design offers coolers with exceptional performance, capable of maintaining cold for up to 5 consecutive days , even in the most extreme conditions. These coolers are a true concentrate of technology, offering both robustness and practicality, while being guaranteed for 5 years against any manufacturing defect, proof of our absolute confidence in their durability and superior quality.

Made from food-grade materials , the MASTA FROST and MASTA ROUNDA coolers are designed to be compatible with dry ice , ensuring optimum temperature retention whether you are in the wilderness, at sea, or during long fishing sessions. Every detail has been designed to offer users total reliability: they include a freezer-style closing gasket , ensuring a perfect seal against any heat infiltration. This high-quality gasket, combined with the "T" clips molded directly onto the cooler, ensures that the contents remain cold, even in intense heat conditions.

MASTA FROST coolers don’t stop there. Their robust design includes, depending on the model, a padlock hole molded directly into the body and lid of the cooler, providing enhanced security, while the long hinges with stops ensure that the lid never opens completely, thus avoiding any risk of breakage or premature wear. Thanks to their non-slip and non-marking rubber feet , the coolers remain perfectly in place, whatever the terrain, offering rock-solid stability. In addition, the molded-in attachment points allow them to be firmly attached to your boat, vehicle or other support, to keep them well secured during your travels.

In terms of practicality , we've thought of everything on the MASTA FROST and MASTA ROUNDA! An unusual and clever touch : each cooler is equipped with integrated bottle openers , allowing you to open your drinks without looking elsewhere. Transport is also made easy, with side handles for the large capacity models, a retractable handle for the more compact model, and even sturdy wheels on the "Wheels" models, making travel ultra-simple, even with a fully-filled cooler.

To ensure impeccable hygiene, each MASTA FROST and MASTA ROUNDA cooler is equipped with a drainage plug combined with a rubber seal , not only ensuring a perfect seal, but also allowing the melted water to be emptied in a few moments and the interior to be easily cleaned. In addition, an automatic pressure regulating valve , located at the front, allows the internal and external pressure to be balanced with a simple click, avoiding any difficulty in opening the cooler in conditions of significant temperature variation.

The ingenuity of the design doesn't stop there: the side drain plug and the pressure regulator knob are both compatible with "Gardena" type nozzles, an ideal option for anglers. Indeed, by adding these nozzles, you can occasionally transform your cooler into a livewell , to keep your catch alive until you return. It's a feature that perfectly illustrates the adaptability and versatility of our coolers.

Finally, on the MASTA FROST, fishermen will particularly appreciate the ruler engraved on the top of the lid , allowing you to measure your catch directly on site, without having to take out additional equipment.