Ventile® Specifications


FEATURES L34 L28 L24 L19
Cloth Weight 165-180 gsm 285-300 gsm 200-205 gsm 235-240 gsm
Threads per cm (warp) 95 71 81 66
Threads per cm (weft) 35 26 30 24
Resistance to water hydrostatic head (min) 750mm 900mm 750mm 750mm
Typical vapour permability 93-98%
More technical details are available on request


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Ventile® Stitching Specification.

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  1. Use double lapped felled seams.
    Do not use plain or raised seams.
  2. Use core-spun polyester thread – polyfill 120 / coats 180’s poly poly
  3. Use as fine a needle diameter as possible, i.e 70’s or 80’s a round point needle with a triangular (sehmetz SD1 is recommended)

stitch types

Guides to overcome ‘seam pucker’ in Ventile Fabric.
There are 3 potential causes of seam plucker.

  1. Inherent or Structural Jamming.
    Follow the above recommendations for stitching. For top stitching / decorative stitching or raised seams, a stitch density of 8 – 9 stitches per 2.5cm is recommended.

  3. Differential Feeding Pucker
    The types of seams used in the manufacture of protective outerwear are more prone to this type of pucker, irrespective of the fabric constructive used.
    This type of pucker can be greatly reduced by the use of a compensation foot to accommodate the differing thickness of the seam either side of the needle. To gain maximum benefit an independent type of compensation foot should be used. This allows even pressure to be applied. It is important that the separate parts of the slipper conform to the stitching margin of the raised seam.

  5. Thread Tension Pucker
    This type of pucker can occur on any tope of fabric, but if the machine is serviced and adjusted correctly and the following procedure is adopted should present few problems.
    Tensions applied to the sewing threads must be kept to a maximum and the threads must have minimum shrinkage at the pressing stage.


  1. The spool or bobbin winder should be set to the minimum tension that will wind an even spool.

  3. Reduce tension of the spoolcase so that it will just support the weight of a full spool and case when suspended by the free end of the thread. (Note extra allowance must be made if devices to avoid spool spin are being used.)

  5. The needle thread tension should then be adjusted to the minimum which will give a well balanced stitch. (Note – ensure the check or take up spring is functioning correctly.)

  7. Ensure that all parts of the machine which come into contact with the sewing threads are smooth, highly polished and free from burrs.

  9. Ensure that the rotary hook mechanism is synchronised correctly.
Taking Care of Your Ventile®

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Ventile® is a Tough and highly breathable entirely natural cotton fabric providing excellent weatherproofing in a single layer and is fully waterproof in a double layer.
Its long pedigree goes back to the Second World War and was used in the first summit of Everest in 1953.
Ventile® is ideal for naturalists, hunters, bushcraft, cycling and climbing.
Ventile® is 100% Cotton, extremely durable and offers users many years of protection and comfort.

Please look after the fabric for maximum durability.

  1. CHEMICALS -Damage to fibres can occur when in contact with acids, bleaches and detergents.   If contact does occur, soak thoroughly in cold water.
  2. SAND AND GRIT -Sand and grit increases the abrasion on cotton fibres and can reduce the lift of the jacket. Please brush off all sand, grit and mud once dried.
  3. CLEANING - We recommend dry-cleaning wherever possible. Should you be unable to dry-clean your garment we recommend the following instructions:-Gently brush or sponge off any dirt.
    Close the zipper/fastener.
    Turn the garment inside out.
    Wash separately
    Machine wash in warm water on a gently cycle using pure liquid soap.
    Ensure all residue soap is removed from the garment, re-rinse if necessary.
    Reshape the garment on a hanger and allow to dry naturally avoiding direct sunlight.
    Iron carefully on a warm setting – this reactivates the DWR treatment.
  4. Ventile can be either dry-cleaned as detailed below* or hand washed using Grangers 30 Degree Cleaner as detailed on the Grangers website *Professional dry-cleaning in: perchloroethylene, hydrocarbons. Mild cleaning process with stringent limitation of added humidity and/or mechanical action and/or temperature. Commercial stain removers on a solvent base may be used with some restrictions. A trial on a concealed part of the article is advisable beforehand.
  5. REPROOFING -Your Ventile® garment may eventually require a reproof. Either use a product such as Granger Extreme Waterproofing for Naturals, following their instructions or a specialist reproofing company familiar with Ventile®.

    If you wish to wash your Ventile garment we recommend Nikwax Tech Wash or pure soap, however please hand wash or ensure that there is no residue of detergent in your washing machine.
    Conventional detergents destroy the water-repellent finish on all waterproof garments.
    To reproof your Ventile® garment, we also recommend washing in Nikwax Cotton Proof.

    Nikwax: +44 (0)1892 786 400 -

    Grangers: +44 (0)1773 521521 -

Ventile® - 'The Natural Choice'