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





From 15 to 17 November, Cousin Trestec will exhibit at METSTRADE in Amsterdam, Europe’s largest trade fair for sailing activities. Meet us at our stand 01.717, we will be happy to assist you with infos on our ropes ranges for Dinghies, Cruise, Competition and Mooring-Anchoring.

SEPTEMBER 2017: Meet us at Coupe Icare

SEPTEMBER 2017: Meet us at Coupe Icare

From 21 to 24 September 2017, Cousin Trestec will exhibit at the Icare Cup (Icare Expo) in St Hilaire du Touvet – Lumbin in Isère. On stand B17-19, Cousin Trestec will display his range of paragliding ropes. The Icare Expo exhibition is the must-see for aerial sports and it is more than 5,000 m² of […]