Extreme Undergarment

Product No: 412178


Stay warm on cold dives with the Extreme Undergarment for drysuits – a game-changer for tech divers. Featuring strategic insulation, breathable panels and plush fleece lining, this one-piece wonder ensures comfort in cold waters. Dive confidently with handwarmer pockets and a zippered pocket for valuables. Discover the perfect fit in a range of sizes.

Product Information


Discover the Extreme Drysuit Undergarment, the right choice for tech divers and cave divers exploring chilly waters. This one-piece undergarment revolutionizes cold water diving with enhanced insulation strategically placed on vital areas, ensuring optimal warmth where it matters. The breathable, windproof and water-resistant panels on the chest and arms, lined with plush fleece, provide a perfect blend of protection and comfort while allowing unrestricted movement.
Crafted from anti-odor, washable and moisture-wicking polyester, this undergarment boasts 450g/m2 "Polar" fleece lining in exposed areas like the arms, legs, chest and back, complemented by a 300g/m2 fleece lining in other areas. Dive with freedom of movement and warmth, enjoying handwarmer pockets and a convenient, zippered pocket for valuables.
For added convenience, the Extreme Undergarment comes with a lightweight dry bag, ideal for storing the undersuit and other essentials. With a wide range of sizes available, this undergarment ensures a perfect fit for every diver. Elevate your underwater experience with the Extreme drysuit undergarment – not just a layer, but a companion for staying warm, dry and ready for adventure in any aquatic environment.

• Enhanced insulation for critical areas of the body
• Breathable, windproof, water-resistant panels on the chest and arms lined with fleece
• Stretchy for better movement
• 450 g / m2 “Polar” fleece lined arms, legs, chest, and back area; 300 g / m2 fleece lining in other areas
• Made from anti-odor, washable, breathable, moisture-wicking polyester
• Handwarmer pockets for comfort and a convenient, zippered pocket for valuables
• Provided with a lightweight dry bag, ideal for storing the undersuit and other items
• Wide range of sizes

Delivery & Returns


Online purchases on mares.com are enabled for Italy, France, Spain, Germany, Austria, Netherlands, Luxemburg, Belgium and Finland. Some products from the catalogue are only available to purchase at an authorised Mares Dealer.

Products shipped in Italy are entrusted to Bartolini couriers. Products shipped in other countries are entrusted to DHL couriers.

Delivery times are 3-5 working days.



If you are not satisfied with your order, you can return it quickly and easily.

You can decide to return any products purchased on mares.com within 30 days of delivery. To return items, use the same box they were received in, complete the returns label found here with shipping details and attach it to the box. Remember to insert the delivery number found on page 1 of the delivery documents.


To allow you greater freedom, we have not chosen a courier service with which you need to return the package, you are free to choose your preferred service provider.

Please remember that shipping costs are your responsibility.


You will receive the total refund on the same payment method you used to place your order, within 14 days after your return has reached our warehouse. 


At the moment, we cannot offer exchanges on our products. If you would like a different size, please return the article for a refund and purchase a new size. If you still have any doubts, you can write us an email at shop@mares.com, our Customer Service team will be happy to help.