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What are flexible sun tunnels made of?

VELUX has improved upon the flexible tube technology used for years in the heating and air conditioning industries. Doing so, we've created a way to bend sunlight around attic obstructions to create the most cost effective and energy efficient skylight system available in the US.

Our Flexible Sun Tunnel consists of a double layer of metalized polyester film with a double inner layer of reinforced aluminum Sola-film and a highly reflective, ultraviolet-proof laminate. The dome on top is made of UV stabilized Grade-One acrylic (or polycarbonate where debris resistance is needed).