Mylar film is a versatile material with many uses, but has drawbacks that make it undesirable for long-lasting, reliable sails. 

North Sails' zero Mylar 3Di construction method creates exceptionally durable sails that resist stretching, UV degradation, and, most importantly, delamination. 

Because of zero Mylar construction, 3Di sails boast enduring shape and performance, resist stretch, and UV damage, and endure harsh weather. This tougher construction ensures consistent, top-tier performance throughout the sail's lifespan.