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Data sheet updated in October 2026
The Prolimit Mercury Steamer Freezip 5/4 2027 is your go-to frontzip winter wetsuit from the Mercury series. It has 5 mm thickness on the torso and 4 mm on the limbs. For Atlantic coast riders, this thickness offers the widest seasonal coverage, taking you from late autumn right through to early spring. Prolimit gives it an 8/10 for warmth and a perfect 10/10 for stretch. It's available in two color options, black and navy blue, both built with the same premium construction: neoprene-free NaturePrene2, a Thermal Rebound2 layer, and a Freezip that opens fully for easy entry.
KEY INFORMATION
PROLIMIT MERCURY STEAMER FREEZIP 5/4 2027 - Men's Winter Fullsuit
What we like
- Two colors are available: Black from 46/XS to 56/XXL, and navy blue from 48/S to 56/XXL, both with identical construction.
- The perfect balance: Prolimit rates this fullsuit 8 out of 10 for warmth. It features one millimeter less thickness on the torso compared to the 6/4. This gives you enhanced flex.
- Effortless entry: The YKK Freezip opens fully, providing a wide opening and a seamless back panel.
- Zodiac2 fleece lining: This fullsuit features jacquard velvet against your skin and a quick-drying thermal fleece behind it.
- Long sizes available: MT and LT sizes maintain the same circumference as M and L, but with added length for taller riders.
Available sizes
Color
Black, blue
Included / Not included
✓ Included: The Prolimit Mercury Steamer Freezip 5/4 2027 fullsuit
❌ Not included: Hood, boots, gloves
DETAILED DESCRIPTION
The 5/4: The heart of the winter range
While the 6/4 is designed for extreme cold and the 4/3 for mid-season, the 5/4 is the fullsuit you'll wear most often. It features 5 mm of NaturePrene2 around the torso to keep you warm during long sessions, and 4 mm on the arms and legs to prevent shoulder fatigue. On the Prolimit scale, it scores 8 out of 10 for warmth and 10 out of 10 for stretch.
Freezip or C-Zip?
The Mercury 5/4 series offers two closure options. This version features the Freezip: a YKK frontzip that opens completely. This provides a wide entry and a seamless back. The C-Zip version uses the same rubber, the same lining, and has the same ratings, but with a symmetrical chest closure. The choice comes down to your preference for donning the fullsuit.
Warmth and Drying
The Zodiac2 lining absorbs water from your skin and releases it quickly. Between the lining and the rubber, the Thermal Rebound2 layer, inspired by survival blankets, reflects body heat and prevents wind-induced cooling. The FTM seams, triple-glued and externally sealed, remain waterproof without losing their elasticity.
Neoprene-free material, two colors
The NaturePrene2 Oystershell is crafted from 80% natural rubber sourced from FSC plantations and 20% recycled carbon black. It's enriched with oyster shell powder and soybean oil, then assembled with water-based glue. On the exterior, it features Quad Flex and Neolight Heather 550+. The black version is available down to 46/XS, while the blue starts at 48/S.
SIZE GUIDE
| Size | Weight (kg) | Height (cm) | Chest (cm) | Waist size (cm) | Hips (cm) |
|---|---|---|---|---|---|
| 46/XS | 54 to 64 | 168 to 173 | 92 to 96 | 69 to 75 | 79 to 85 |
| 48/S | 61 to 70 | 171 to 176 | 96 to 100 | 75 to 81 | 85 to 91 |
| 50/M | 68 to 77 | 173 to 178 | 100 to 106 | 80 to 86 | 90 to 96 |
| 51/MT | 70 to 79 | 183 to 190 | 100 to 106 | 80 to 86 | 90 to 96 |
| 52/L | 77 to 86 | 177 to 181 | 106 to 111 | 85 to 91 | 95 to 101 |
| 53/LT | 79 to 88 | 188 to 196 | 106 to 111 | 85 to 91 | 95 to 101 |
| 54/XL | 86 to 95 | 178 to 186 | 111 to 116 | 90 to 96 | 100 to 106 |
| 56/XXL | 95 to 104 | 183 to 188 | 116 to 121 | 95 to 101 | 105 to 110 |
TECHNICAL SPECIFICATIONS
| Specifications | |
|---|---|
| Product | Prolimit Mercury Steamer Freezip 5/4 2027 |
| Type | Men's fullsuit |
| Series | Mercury |
| Thickness | 5 mm on the torso, 4 mm on the arms and legs |
| Material | NaturePrene2 Oystershell, neoprene-free |
| Inner lining | Zodiac2 with Thermal Rebound2, Velvet Airflex |
| Outer Lining | Quad Flex and Neolight Heather 550+ |
| Closure | Freezip, full-opening YKK frontzip |
| Seams | FTM (Fluid Taping Method), triple glued |
| Color | Black, blue |
| Warmth (Prolimit scale) | 8 out of 10 |
| Stretch (Prolimit scale) | 10 out of 10 |
| Sizes | Black: 46/XS to 56/XXL; Blue: 48/S to 56/XXL |
| Supplier reference | 400.74035 |
FAQ - PROLIMIT MERCURY STEAMER FREEZIP 5/4 2027
This wetsuit is for riders who sail from October to April. It keeps you warm without feeling restricted. For Kite, Wing, or Surf, it covers most of the Atlantic winter. If you get colder easily or ride in colder waters, the 6/4 from the same series adds one millimeter to the torso.
Black and navy blue cost the same. They share the same construction. Only the size grid differs: black is available in 46/XS, blue starts at 48/S. The rest is a matter of taste.
The size guide uses Prolimit's men's chart. It includes weight, height, chest, waist, and hip measurements. If you are between two sizes, choose the one that closes without being tight around the torso. MT and LT are for tall riders with M or L chest sizes.
Rinse with fresh water after each session. Dry it in the shade on a wide hanger, inside out then right side out. Close the zip before hanging it to avoid pulling on the front panel. Avoid direct sunlight and heating.
The Pornichet store has been open since 2005. Wetsuits are in stock there, in several sizes, for you to try before buying. We also answer by phone, WhatsApp, or email to help you choose between the 6/4, 5/4, and 4/3.
▶ Need advice?
GlissEvolution, 2c avenue du Gulfstream, 44380 Pornichet (Loire-Atlantique)
09 62 64 74 77 | WhatsApp: 07 83 28 39 94, Tuesday to Saturday, 10am-1pm / 3pm-7pm
Test center available by appointment
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