Woodwick® Trilogy Collection offers fragrance combinations, each creating its own, unique experience as the layers melt together! Woodwick® Trilogy Collection Medium Hourglass Woodwick® Candles also feature a soft crackle from a natural wooden wick that Crackles as it Burns™. The distinctive crackle of WoodWick® candles is creaed by a patented PLUSWICK® Innovation technology, designed to ensure a safe and consistent multi-sensory experience with faster fragrance and an optimal burn while fragrancing your home with the sound of a crackling fire.