The pinnacle of cold water wetsuits, the Furnace provides an unparalleled level of heat. The warmest wetsuit we make, our top-shelf mens wetsuit is now made with eco-conscious materials without sacrificing heat or flexibility. The fullsuit is lined with incredibly lightweight and heat-conductive Graphene-infused yarns, now made from 100% recycled fibers. Our eco-conscious Smart Foam — made from upcycled tires — is topped with ultra-lightweight Airlite jersey, also made from recycled materials. The incredibly comfortable and ultra-warm suit is topped with a Drymax entry system to keep water out and heat in. The lightweight, high stretch and thermal retentive fabrics combine with 100% externally welded seams and a seamless back panel for the ultimate performance wetsuit. Features a clean design with small logo hits.
Product Info
The pinnacle of cold water wetsuits, the Furnace provides an unparalleled level of heat. The warmest wetsuit we make, our top-shelf mens wetsuit is now made with eco-conscious materials without sacrificing heat or flexibility. The fullsuit is lined with incredibly lightweight and heat-conductive Graphene-infused yarns, now made from 100% recycled fibers. Our eco-conscious Smart Foam — made from upcycled tires — is topped with ultra-lightweight Airlite jersey, also made from recycled materials. The incredibly comfortable and ultra-warm suit is topped with a Drymax entry system to keep water out and heat in. The lightweight, high stretch and thermal retentive fabrics combine with 100% externally welded seams and a seamless back panel for the ultimate performance wetsuit. Features a clean design with small logo hits.
Product Details
Thickness: 4/3mm
Neoprene: Airlite jersey
Internal Lining: Smart Foam
Entry System: Chest Zip
Hood: No Hood
MPN: MWFU3BU4
Product Features
Men’s 4/3 wetsuit.
Chest zip entry.
Exterior: Airlite Recycler — our most flexible, perforated stretch jersey is now made from 100% recycled materials.
Smart Foam: upcycled car tires and neoprene scraps combine to create the highest thermal retention and lightweight stretch combination.
Fully lined with Graphene-infused, 100% recycled yarns.
DryMax Chest Zip Entry.
100% welded exterior seams, machine-applied stretch tape to high-stress areas.
Water-based adhesive.
Warranty
This product is backed by a warranty from the manufacturer. Click below for details on the warranty policy for Billabong products.
Billabong Warranty Update – Effective February 14, 2025
As of February 14, 2025, Billabong no longer offers warranty repairs. If you purchased your wetsuit from Cleanline Surf and are experiencing a warranty issue within the one-year warranty period, please contact us at support@cleanlinesurf.com with the following information:
Order Number
Photos of the problem area
A written description of the issue
We will review your claim. If approved as a warranty issue, you may ship the wetsuit back to Cleanline Surf. Once received, we will either send a replacement (if available) or issue store credit for the value of the wetsuit.
Please note: The Billabong warranty process is subject to change.
Warranty Exclusions
The following circumstances are not covered under warranty:
Self-repair or alterations to the product
Warranty requests without proof of purchase
Wetsuits more than one year from the purchase date
Accessories more than three months from the purchase date
Returns
If you are not 100% satisfied with your purchase you may return it for a refund, or exchange within 30 days of receiving your order.
Cleanline Surf Wetsuit Return Policy
Returns are easy! We understand that in some situations returns may be necessary. We also want you to be stoked on your purchase. If you are not 100% satisfied with your purchase you may return it for a full refund, within 30 days of receiving your order. Items must be in new condition with original tags and packaging.
Please note: We are unable to accept returns on used wetsuits. If you are unsure about your wetsuit fit or have any questions at all, please call us before using your wetsuit and we can offer guidance.
Please refer to our full Return Policy for more details.
Billabong Men's Wetsuits ‐ Size Chart
At Cleanline Surf we specialize in sizing Billabong Wetsuits. We do have
size charts available below, however if you have never tried on a Billabong
Wetsuit before, we strongly urge you to call and speak with one of our
Billabong Wetsuit experts. When it comes to Billabong Wetsuits, getting the
right size is extremely important and a quick phone call will save you both
time and money by avoiding a return.
Great suit! Warm. Easy to get in and out of because if the zipper system. My second Billabong suit.
K
Ken
Furnace 4/3
Warmest wetsuit Ive ever owned. I have the 4/3 chestzip has an extra gasket and it is practically flushproof. Of all the brands Ive tried , this Billibong model fits my body type best. Im 6’ tall 145lbs w narrow shoulders. M fits me perfectly and legs are long enough to cover top of booties. Ordering a 3/2 next
E
Elaine
Great wetsuit for the cold winter water in Northern California%
My son says this wetsuit, a Christmas present, has been keeping him warm in the waters off San Francisco. Also, the Cleanline Surf people included a little surprise present with the wetsuit. and it was delivered a day early. I am impressed with the service.
Use left/right arrows to navigate the slideshow or swipe left/right if using a mobile device
Choosing a selection results in a full page refresh.
Press the space key then arrow keys to make a selection.
What Our Customers Are Saying