The Cotton Canvas Duck is our heaviest and most durable Kilt. This 10oz Canvas Duck has a tighter weave than regular canvas giving it incredible strength, warmth, and gets comfy soft with years of wear. If outdoors in the cool of Winter is your thing then this is your Kilt. That tight weave helps with wind resistance and warmth. Being a 100% Cotton it is also the best choice when making sparks welding or playing with fire.