About Us

Cousin Trestec,
always more innovative

Located in the North of France, Cousin Trestec specialises in the manufacturing of innovative ropes and braids.

With 170 years of experience, Cousin Trestec is a key player in the industry and leisure markets.

Innovative ropes for high performances

Branch of the Dalle & Associés group, COUSIN Trestec has been a specialist of fibres transformation by spinning, cabling, braiding and coating since 1848.

COUSIN Trestec is the reference on the rope market, with customers in various sectors, such as leisure and sport (yachting, climbing, caving, trekking, mountaineering, paragliding, kitesurfing...), safety (work at height, rescue, handling, events...), industrial (offshore, hoisting, automotive...), and military.

With the benefit of the expertise from the group and its sister companies  (COUSIN Biotech, COUSIN Composites, Major Sport – Tecnifibre), COUSIN Trestec commits to offer solutions matching your needs and to bring you all their know-how for quality and innovation to address your requirements accurately.
On top of our rigour and expectations for product design, we place your satisfaction in first place.

170 years of know-how and French quality

COUSIN Trestec uses the best available raw materials to increase comfort, safety and performance: polyamide and high tenacity polyester, Technora®, Dyneema®, Twaron®, HMPE, Spectra®, Vectran® or the recent PBO®.

COUSIN Trestec has not only an unmatched knowledge of the materials, but also the ability to combine all the technologies and to control perfectly the thermic treatments (stretch, shrinkage, stabilisation, waterproofing) and coatings.

COUSIN Trestec also designs your tailor-made products to your own specifications. Working with traditional know-how while mastering the high-tech fibres makes the COUSIN Trestec hallmark.



Foundation of COUSIN Frères, specialising in spinning and braiding line, cotton and hemp yarns.

Late XIXth

Manufacturing of sewing threads and strings


1st rope-maker to use synthetic fibres.


1st products ranges dedicated to yachting and climbing.


Market Leader for paragliders and parachutes lines.


Market Leader for safety and access ropes.


CE marking.


COUSIN Frères creates a group with several subsidiaries for each activity - COUSIN Trestec, COUSIN Composites (rods and optic fibres) , COUSIN Biotech (medical implants), COUSIN Office (corporate general services).


Launch of the first range of lines for kitesurfing.


ISO 9001 Certification version 2000.


Dalle & Associés takes over COUSIN Trestec, COUSIN Composite and Major Sport.


Cousin Trestec develops Constrictor®, a new textile rope clutch which sets new standards in the sailing sector.


Cousin Trestec partners with "Souffle du Nord" with Thomas Ruyant and Adrien Hardy who made the 4th place in the IMOCA class at transat Jacques Vabre.

Cousin Trestec

Hot figures

working 47000

km of ropes made each year

working 60000

plaits necessary to the manufacture

working 170

years of experience

working 60

countries all over the world

working 80

mm diameter maximum



Summer closure

Summer closure

Cousin Trestec will be closed from July 31st to August 25th included. For any request, do not hesitate to send an email via our contact form, we will read it as soon as we return. Enjoy your holidays!

JUNE 2017: Meet us at European Tree Climbing Championship in Deventer

JUNE 2017: Meet us at European Tree Climbing Championship in Deventer

The purpose of the European Tree Climbing Championship is to promote safe working practices, demonstrate improvements and innovations in techniques and equipment, and provide industry recognition to the European public. Date: 23-25 June 2017 Location: Worp Plantsoen, 7419 Deventer, Netherlands ABOUT ETCC The European Tree Climbing Championship (ETCC) provides a competitive but educational opportunity for […]