HH LIFA® Light is a high-performance base layer, offering insulation, lightweight comfort, and durability for everyday wear and the most intense activities. HH LIFA® Light is made from 100% Lifa fiber, which is quick-drying, highly breathable, and super lightweight. Continuously refined over the past 40 years, Lifa® Stay Warm technology is the sole ingredient in all Helly Hansen base layers.