Drum shells are the main bodies of drums, typically made from materials like wood, metal, or acrylic. They come in various sizes and shapes, which affect the drum's sound and tone. The thickness and type of material used can influence how the drum resonates and projects sound. The construction of drum shells often involves layering materials to enhance durability and acoustics. Common types of wood used include maple, birch, and mahogany, each providing distinct tonal qualities. The shell's design, including its diameter and depth, plays a crucial role in determining the overall sound of the drum set.