Our Materials

Our materials

A good rain garment starts with the right fabric. Here are the materials we use, what they do for
you, and where they come from.

Biovinyl+
Biovinyl+ is our own rainwear material. It’s made from BIOVYN™, the world’s first commercially
available bio-attributed PVC, and the phthalate-free plasticiser Pevalen™ Pro 100 from Sweden’s
Perstorp — both linked to renewable biomass through certified mass balance. The result is
completely waterproof, free of phthalates and PFAS, and never needs reproofing. It’s fieldtested
down to −30 °C and built to last.

Farmerrain’s sailing jacket has a third-party-verified Environmental Product Declaration (EPDIES-
0005125, ISO 14025, reviewed by Sweco Environment): 5.82 kg CO2e per jacket, cradle to
grave, made of 88 percent bio-based PVC and 12 percent recycled polyester from PET bottles.
The latter is the backing fabric – and the backing fabric itself is 100 percent recycled PET
polyester, across all our own fabric qualities, and always has been. The material contains no
phthalates and no substances on the EU’s SVHC list, the water column is above 20,000 mm, and
it is Oeko-Tex tested. The declaration is valid until January 2027, and a new measurement is
underway.

An EPD like this isn’t marketing copy – it’s an independently reviewed life cycle assessment,
produced under fixed product category rules and checked by an external, accredited reviewer –
in our case Sweco Environment. It’s also time-limited and has to be renewed, which is why a
new measurement is already underway. We haven’t found another rainwear brand we track
that has published an equivalent, third-party-verified EPD for one of its own garments – which is
why we can state a specific figure like 5.82 kg CO2e per jacket outright, rather than as an
estimate.

→ Read more about Biovinyl+: a deeper look at BIOVYN™, Pevalen™ Pro 100, mass balance
and the comparison with traditional PVC is on the separate Biovinyl+ page.

Material list

Farmerrain's own fabrics Made in Sweden/EU. Phthalate-free, EPD-verified.

Blank Biovinyl+

Blank Biovinyl+ — 400 g/m², water column >20,000 mm, cold-resistant.

Biovinyl+

430 g/m², water column >20,000 mm, cold-resistant.

Raintex Biovinyl+

470 g/m², water column >20,000 mm, oil- and cold-resistant, phthalate-free.

Raintex Light+

250 g/m², phthalate-free.

Farmerrain models in Opalo and Plavitex
Models designed and sold exclusively by Farmerrain, made from fabric supplied by AJ Group in Poland. Not phthalate-free.

Opalo 1000

1000 g/m², cold-resistant (the Strong waders).

Opalo 700

700 g/m², cold-resistant (Opalo Rainwear)

Plavitex 500

500 g/m², cold-resistant (women's waders).

Plavitex 700

700 g/m², cold-resistant (standard waders).

Deadstock

Limited quantities of older warehouse-stocked fabric. Not phthalate-free.

Deadstock

370 g/m², cotton backing, PVC-coated. Made in Norway, before today's chemicals legislation existed, and may contain traditional phthalate-based plasticisers, since the fabric comes from older stock. Limited quantity.

Biovinyl

400 g/m², water column >20,000 mm, not cold-resistant. Made in Sweden. An older vinyl quality from before the switch to today's Biovinyl+, remaining in limited quantity.

Other brands
Ålesund — made in China

Doggerbank

480 g/m², mechanically hard-wearing, oil-/grease-/cold-resistant. Being discontinued — no longer available in green. Manufacturing has moved from the EU to China.

Jacket Doggerbank Unisex PVC

Guy Cotten — made in France

Nylpeche

485 g/m², water column 13,000 mm.

Cap-Coz

480 g/m², condensation-reducing, water column 13,000 mm.

Water column — what the number tells you, and what it doesn’t

Water column measures the static water pressure a fabric withstands before water is forced through, expressed in millimetres (mm) according to ISO 811. The higher the value, the more waterproof the material — in the test rig.

  • EN 343, the European standard for protective clothing against rain, divides garments into classes where the highest waterproofness class requires testing even after pre-treatment such as abrasion and flexing.
  • A sealed coating of PVC or PU type does not leak at the pressures that occur in rain — waterproofness is in practice limited by the seams and details, not by the fabric. That’s why welded seams are decisive.
  • For membrane garments, 10,000–20,000 mm or more is often specified. High numbers are needed there, because the membrane’s function is put under strain by point pressure and wear.
  • The number says nothing about how the garment performs after a year of use. A DWR-dependent garment loses perceived performance as the coating wears — a coated fabric does not.

How a water column test works

The test is standardised through ISO 811 (the European equivalent is EN 20811, the American one AATCC 127) and works roughly the same regardless of which lab performs it. A fabric sample is clamped horizontally in a test rig, with the water against the underside — the side that, in a finished garment, faces the rain from outside. The water pressure is then raised at a steady, controlled rate (10 or 60 cm of water column per minute, according to the standard) while the top side of the fabric is monitored. As soon as water penetrates at three separate points, the test is stopped, and the pressure at that moment is the result — converted to millimetres of water column. The test is repeated on several pieces of the same fabric and reported as an average. The test is done on a small, flat piece of fabric in a lab, not on a sewn garment — seams, zippers and wear surfaces are not tested here but handled separately. The pressure rises steadily over a few minutes,

Guideline values — what water column do you need?

  • Below 5,000 mm: light rain for shorter periods.
  • 5,000–10,000 mm: everyday use and moderate activity. Many PU consumer garments fall here.
  • 10,000–20,000 mm: full days outdoors, sustained rain and pressure points.
  • Above 20,000 mm: professional use and the most demanding conditions.

Farmerrain’s recommendation: for those who work or spend full days outdoors in rain — at least 10,000 mm combined with welded seams. Farmerrain’s own fabrics Biovinyl+, Blank Biovinyl+ and Raintex+ have a water column above 20,000 mm, and the Guy Cotten materials in the range are at 13,000 mm.
Seams and welding

Seams and welding

Seams: taped, single-welded and double-welded

  • Taped seams: sewn, with the needle holes sealed by a heat-bonded tape. Standard in membrane garments. The tape is a separate component that can age and detach.
  • Single-welded seams: joined with high-frequency or hot-air welding into a homogeneous seam. No needle holes, no tape.
  • Double-welded seams: the seam is welded along two lines, giving higher mechanical strength and redundancy. Standard in heavy-duty professional garments.

The rule of thumb: tape is a seal added afterwards, a weld is part of the material itself. Farmerrain’s garments are double-welded with high-frequency welding on the vast majority of models — the exception is the unlined coat and Wilma, which have taped seams.

Welding rainwear — how the methods work

High-frequency welding (HF/RF)

The industry standard for joining PVC- and PU-coated fabric. An electrode applies an electromagnetic field oscillating at 27.12 MHz across the fabric layers, which makes the polar molecules in the coating move — the heat is generated inside the material, not from an external heat source. Done correctly, the seam becomes as strong as the surrounding fabric. Forsstrom High Frequency in Lysekil is one of the world's leading manufacturers of HF welding machines specifically for PVC and PU.

Hot-air and hot-wedge welding

The heat comes from outside via hot air or a heated wedge. Well-proven, but more sensitive to speed and temperature variations than HF.

Ultrasonic welding

A tool (sonotrode) vibrates mechanically (20–40 kHz) and the friction heat melts the material. Fast, but a considerably less precise way of joining thicker coated materials — the risk is twofold (under-welding that leaks, or over-welding that burns). The technical literature on textile joining describes ultrasonic welding as unsuitable for thicker coated materials.

How Farmerrain does it: our garments are double-welded with high-frequency welding. Two weld lines, heat generated inside the material, a seam as strong as the fabric.

Care instructions
Your rain garment is built to last for years. Here’s how to look after it.
Don’t wash more than necessary — vinyl garments are easy to keep clean. Clean primarily with a damp cloth and lukewarm water, without detergent. For more stubborn dirt, use uncoloured soap flakes. If the garment needs machine washing, wash at 40 °C without fabric softener, preferably inside out. Never tumble dry — let it air-dry on a hanger instead. Creases can be carefully ironed out on a low setting from the inside, with a cloth in between. Don’t store light, glossy garments against dark colours, leather or faux leather, as they may transfer colour.
Exception: waders are always hand-washed. Lern more

FAQ