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Data sheet updated in October 2026
The Prolimit Mercury Steamer Freezip 6/4 2027 is the thickest Mercury frontzip wetsuit. It features 6 mm of NaturePrene2 around the torso and 4 mm on the arms and legs. This is the fullsuit in the series for those brutal December to March sessions when water temperatures plummet and the wind bites hard. Prolimit rates it a 9 out of 10 for warmth, a step up from the 5/4, while still delivering a perfect 10 out of 10 for stretch. The Thermal Rebound2 layer reflects body heat, and the Freezip frontzip opens completely, so you can get into the wetsuit without a struggle.
KEY INFORMATION
PROLIMIT MERCURY STEAMER FREEZIP 6/4 2027 - Men's winter fullsuit
What we like
- 6 mm torso thickness: This is the thickest panel in the Mercury Freezip range, strategically placed where your body loses heat fastest.
- 9 out of 10 for warmth: The highest warmth rating for the 2027 Mercury Freezip series on Prolimit's scale.
- Uncompromised stretch: Despite its thickness, Prolimit maintains a maximum 10 out of 10 rating thanks to the Quad Flex lining.
- YKK Freezip: This frontzip opens completely, letting you get in and out of the wetsuit easily, even with cold hands.
- Thermal Rebound2: A reflective layer, inspired by emergency blankets, is sandwiched between the rubber and the Zodiac2 fleece.
- No neoprene: NaturePrene2, a natural rubber sourced from FSC-certified plantations, is assembled with water-based glue.
Available sizes
Included / Not included
✔️ Included: The Prolimit Mercury Steamer Freezip 6/4 2027 wetsuit
❌ Not included: Hood, boots, gloves
DETAILED DESCRIPTION
The warmest Mercury
Prolimit considers the Mercury one of its most versatile wetsuits, and the 6/4 is the extreme cold-weather version. The torso features 6 mm of NaturePrene2 for insulation, while the arms and legs remain 4 mm for freedom of movement. On Prolimit's in-house scale, this translates to a 9 out of 10 for warmth and a 10 out of 10 for stretch.
What keeps you warm
Three layers work together to retain heat. Against your skin, the Zodiac2 fleece, a jacquard velvet, is backed by a fast-drying thermal fleece. Behind that, the Thermal Rebound2 membrane, inspired by survival blankets, reflects heat back to your body and cuts wind chill. Finally, there's the 6 mm rubber.
A front zip, a seamless back zip seam
The Freezip is a YKK frontzip that opens completely. This provides a wide entry. The back remains a single panel without a closure, so your shoulders have full freedom of movement when paddling or pulling on the bar. The FTM seams are triple-glued and externally sealed with a wider tape than the seam, then glued and blind-stitched internally.
NaturePrene2 Oystershell Rubber
This fullsuit contains no neoprene. NaturePrene2 combines 80% natural rubber from FSC-certified plantations with 20% recycled carbon black, oyster shell powder, and soybean oil. On the outside, the Quad Flex lining stretches in every direction, and Neolight Heather 550+ marks the Thermal Rebound-lined areas.
SIZE GUIDE
| Size | Weight (kg) | Height (cm) | Chest (cm) | Waist size (cm) | Hips (cm) |
|---|---|---|---|---|---|
| 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 6/4 2027 |
| Type | Men's fullsuit |
| Series | Mercury |
| Thickness | 6 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 |
| Warmth (Prolimit scale) | 9 out of 10 |
| Stretch (Prolimit scale) | 10 out of 10 |
| Sizes | 48/S, 50/M, 51/MT, 52/L, 53/LT, 54/XL, 56/XXL |
| Supplier reference | 400.74030 |
FAQ - PROLIMIT MERCURY STEAMER FREEZIP 6/4 2027
For those who ride in truly cold winter water and stay out for extended periods. The 6 mm on the torso makes a real difference during a two-hour kite or wing session, especially when a 5/4 starts to reach its limits. For autumn and spring, the 5/4 or 4/3 from the same series is sufficient.
It's the extra millimeter on the torso. Prolimit rates the 6/4 at 9 out of 10 for warmth, compared to 8 out of 10 for the 5/4. The material, lining, seams, and zip are identical, and both maintain a 10 out of 10 for stretch. The 6/4 starts at size 48/S, while the 5/4 is also available in 46/XS.
The size guide uses Prolimit's men's chart. A winter wetsuit needs to fit snugly without constricting your rib cage. With 6 mm thickness, any circulating water quickly becomes a problem. MT and LT sizes maintain the girth of M and L for taller riders. If you're unsure, trying it on at the shop will confirm the best fit.
Rinse it with fresh water after each session, including the inside. Let it dry in the shade on a wide hanger. A 6 mm wetsuit takes time to dry: start inside out, then turn it right side out. Avoid direct sun or a radiator, which hardens the rubber and stresses the glued seams.
We have been in Pornichet since 2005. Prolimit wetsuits are in stock, ready to try on. Our team rides in winter on La Baule bay. We help you choose the thickness and size in our store, by phone, WhatsApp, or email.
▶ 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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