Willow Panels: Maximum Density Single Weave Wattle panels with painted steel frames. Powder coated steel frames were sent to The Willow Farm, willow was woven into the frames and send to the site to be installed. The color of the frames was chosen to match the eventual, faded color of the panels and to blend in with the neutral aesthetic of the resort. Steel frames can increase longevity and are easier to replace. However, steel frames are not recommended for on top of an existing trellis.