Heavy weight and light weight kilts differ in the amount of fabric weight used, which affects how the kilt drapes, feels, and performs. Heavy weight kilts, often made from thicker wool, create a fuller, more structured appearance and help pleats hold their shape, making them ideal for traditional and formal wear. Light weight kilts use thinner fabric, resulting in a softer drape and increased ease of movement, which can be more comfortable for everyday use or warmer conditions. The choice between heavy and light weight depends on preference, climate, and how the kilt is intended to be worn.