The Fastnet product line is our Premium Offshore Cruising fabric. Fastnet are the most durable offshore cruising dacrons. They are constructed using massive warp fibers that will significantly improve the longevity of the sail compared to other fabrics. This new concept of using an increased denier on the surface area of the sail is the most efficient and cost effective way of extending a sail's life. 

Fastnet is the 2018 upgrade from High Mass Fiber Weaves.

The Clipper Around the World Race has used Challenge Sailcloth exclusively for the last four editions of the race. These boats use the same sails for over 50,000 miles, and rely on Challenge engineering to power them the entire way. Fastnet represents a technological breakthrough in sailcloth technology, and is a direct result of research and development for this race. Challenge was asked to develop an excellent UV resistant cloth and we delivered. 


Fastnet uses High Mass Fiber Technology

How does it work?

All physical matter on the planet will eventually degrade over time due to ultraviolet light exposure, including polyester. The industry has done extensive research to develop a way to protect against UV. Challenge has pioneered the most innovative solution.

Instead of adding another coating of chemicals which increases the cost of fabric, we use larger denier “high mass” fibers on the surface area of the cloth. In the Understanding Sailcloth section of our website, we explain that during the weaving process one fiber is exposed to the sun on the surface area of the cloth, and the other fiber sits underneath the crimp. Challenge has selected "high mass" fibers to sit on the surface area, with the load-bearing fill fibers hidden from the sun under the crimp. Everything degrades in the sun, but these high mass fibers double the life in UV degradation in comparison to a more conventional fabric of the same weight.

Application: Premium Low Aspect Offshore Cruise



Fastnet Product Specifications