The weight of clothing is determined by both the material density and the physical construction of the garment. In terms of fabric, heavyweight denim, wool tweed, and heavy-duty canvas are among the most substantial materials. A pair of premium, raw denim jeans (often 21oz or higher) can weigh significantly more than standard retail versions. Outdoor and winter gear typically represent the heaviest individual items in a wardrobe; for example, a full-length wool overcoat or a high-fill-power down parka can weigh between 2 to 4 kilograms (4.4 to 8.8 lbs). Footwear is another major contributor, with steel-toed work boots or insulated winter hiking boots often weighing as much as a small suitcase. When packing for travel, seasoned travelers categorize "heavy" items as those made from thick knits like bouclé or corduroy, and they generally recommend wearing these bulky pieces during transit rather than packing them, as they can quickly consume a significant portion of a 23kg checked baggage allowance or a 7kg carry-on limit.