Load image into Gallery viewer, Isurus Fathom 5/4 Hooded Chest-Zip Wetsuit
Load image into Gallery viewer, Isurus Fathom 5/4 Hooded Chest-Zip Wetsuit
Load image into Gallery viewer, Isurus Fathom 5/4 Hooded Chest-Zip Wetsuit
Load image into Gallery viewer, Isurus Fathom 5/4 Hooded Chest-Zip Wetsuit
Load image into Gallery viewer, Isurus Fathom 5/4 Hooded Chest-Zip Wetsuit
Load image into Gallery viewer, Isurus Fathom 5/4 Hooded Chest-Zip Wetsuit
Load image into Gallery viewer, Isurus Fathom 5/4 Hooded Chest-Zip Wetsuit

Isurus Fathom 5/4 Hooded Chest-Zip Wetsuit

Regular price $464.95
Sale price $464.95 Regular price
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Color:
Black
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SKU: ISRIW54HF6MFBLKS

Product Info

The warmest wetsuit in the Fathom lineup, the Isurus Fathom 5/4 Hooded Chest-Zip Wetsuit is built for cold-water performance with an integrated hood and enhanced insulation throughout. Designed for temperatures around 48°F / 9°C and below, it helps maintain warmth during long winter sessions and harsh conditions. Made from a Premium Japanese Limestone Neoprene, this wetsuit will give you superior warmth and lighter weight compared to petroleum based and natural rubber wetsuits it competes against. No shortcuts. Just a different equation.


Product Info

The warmest wetsuit in the Fathom lineup, the Isurus Fathom 5/4 Hooded Chest-Zip Wetsuit is built for cold-water performance with an integrated hood and enhanced insulation throughout. Designed for temperatures around 48°F / 9°C and below, it helps maintain warmth during long winter sessions and harsh conditions. Made from a Premium Japanese Limestone Neoprene, this wetsuit will give you superior warmth and lighter weight compared to petroleum based and natural rubber wetsuits it competes against. No shortcuts. Just a different equation.

Product Details

  • Thickness: 5/4mm
  • Torso Neoprene: Premium Japanese Limestone
  • Arms & Legs Neoprene: Limestone
  • Jersey: FZS (Four Zone Stretch), AQF (Advanced Quantum Flex)
  • Entry System: Chest Zip
  • Hood: Attached Hood
  • Water Temps: 48°F and below [>9°C]
  • MPN: IW54HF6MF

Product Features

  • Arms Up Design
  • Bio-Mechanical Lat Panel
  • Muscles Stabilization Technology
  • New Dual Silicone Inner Wrist Cuff and Leg Opening Seals
  • Gutter Ball Drainage
  • Key Pocket
  • Duraflex® Hardware
  • YKK® Military Grade Zippers
  • #38 STX Kneepads
  • SCS Seam Tape
  • Forward Propulsion System
  • Silicone Pre-Tensioners
  • Bluesign® & Oeko® Certified Jersey

Additional Info

At Isurus, their passion is to build world-class wetsuits that stand up to the harshest conditions the ocean might offer. Living and surfing in and along the California coast, a frequent topic of conversation was just how much wetsuit innovation had stagnated and quality had deteriorated. It is about designing a wetsuit that improves surfer performance.

Using The New Fathom Alloy
By integrating Premium Japanese Limestone-based neoprene with newly developed Performance Jerseys, we’ve engineered a wetsuit that balances warmth, flexibility, and durability with a more accessible price point.

Sharing the same front-zip architecture (arms-up design, bio-mechanical lat panel, YKK front zip design, etc) as the Evade series, the Fathom Alloy delivers proven fit and performance - reimagined through a more forgiving, everyday material platform.

New Material Combinations Blending Flexibility & Strength

Isurus Wetsuits New Material Combinations for 2026

Best-In-Class Wetsuits
Premium materials cost more. We want more surfers to experience ISURUS wetsuits. By combining proprietary Japanese Limestone Neoprenes and Jerseys, our Fathom Alloy provides incredible performance at a more accessible price point.

Alloys For The Win
Modern alloys make modern engineering, construction and technology possible. It means we can make better products at a lower price without resorting to using the same mass-market factories as 95% of the wetsuit industry.

Same Isurus Fit & Design
Materials are critical to warm, flexible wetsuits, but the fit is also key. Isurus wetsuits just "fit better" - and that's thanks to our panel design and arms-up construction. The Fathom Series features the same Isurus fit that surfers love.

The Quest To Build A Better Wetsuit

Arms-Up Design
Isurus took a new approach to pattern-making for surf wetsuits. Wetsuit patterning, like all clothing (for the past 50 years) have been made with the arms hanging at your side, okay for street clothes, but for surfing wetsuits, it is restrictive. Isurus designed the wetsuit with the arms raised overhead. Putting your arms in the optimal power position for paddling.

Bio-Mechanical Lat Panel
Isurus has designed a one-piece side panel, stretching from the hip to the elbow joint, this provides unrestricted flexibility and maximum paddling power.

Muscle Stabilization Technology
Surfing exposes muscles to high frequency muscle vibration, a cause of premature muscle fatigue. The Kinesiology based MST Muscle Stabilization Technology developed by Isurus, wraps and stabilizes key muscle groups stressed when surfing.

Forward Propulsion System
Water entrapment zone on forearms for increased paddle power.

Duraflex® Hardware
100% Acetal® (POM) non-corrosive hardware and cord locks to make sure everything stays tight and never rusts or corrodes.

Key Pocket
Simple, effective fold-over pocket with elastic keep keeper loop.


Wetsuit Care Tips

  1. Freshwater Rinse After Every Session
  2. Dry Your Wetsuit in the Shade
  3. Hang Up Your Wetsuit Correctly
  4. Do Use an Occasional Wetsuit Shampoo
  5. Take Care When Taking off Your Wetsuit


Warranty

This product is backed by a warranty from the manufacturer. Click below for details on the warranty policy for Isurus products.

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.