About Hemp Fibers

Hemp fiber comes from the stalk of the industrial hemp plant, a tall Cannabis sativa variety grown for fiber and seed rather than for any drug content. The useful fibers run in the outer bark of the stalk — the bast layer — and they are among the longest and strongest natural fibers used in textiles. Hemp clothed sailors, soldiers and laborers for centuries before cotton and synthetics pushed it to the margins.

Hemp appeals to the modern apparel industry for two reasons that rarely arrive together: performance and agronomy. The fiber is durable, absorbent and resistant to mildew and ultraviolet light, and the plant grows fast in many climates. Its historic drawback is hand feel — raw hemp is coarse — so most apparel hemp today is softened, refined or blended with cotton or other fibers before it reaches a garment.

Retting and Separating the Bast

After harvest, hemp stalks go through retting, a controlled rotting that loosens the bast fibers from the woody core. Dew retting spreads the stalks in the field and lets weather and microbes do the work; water retting soaks them in ponds or tanks and works faster, with more effluent to manage. The dried stalks are then broken and scutched — in modern plants, decortication machines crush the stalks and separate long fiber, short tow and woody hurd in one flow.

Long hemp fibers are hackled, or combed, and wet-spun much like flax for finer yarns, while shorter fiber is carded and blended. Because hemp fibers are long and stiff, spinners use softening and degumming steps to strip out some of the lignin that makes the fiber harsh. The result ranges from rugged canvas yarn to apparel yarns fine enough for shirting when blended with cotton.

Properties That Matter in Clothing

Hemp is stronger than cotton, holds its shape under stress, and keeps much of its strength when wet, which is why it ruled rope, sailcloth and work clothing for so long. It absorbs moisture readily, breathes in warm weather, and resists mildew better than most plant fibers — a practical advantage in shoes, bags and outdoor clothing. Hemp fabrics also soften noticeably with washing, so a hemp garment usually feels better in its second year than on the rack.

The limits are stiffness, wrinkle and color. Hemp yarns are less elastic than cotton, fabrics crease, and dyeing to deep, even shades takes care because the fiber surface varies. Blending answers most of it: hemp-cotton blends dominate apparel because cotton contributes softness and easy dyeing while hemp contributes strength, texture and durability.

Where Hemp Is Used

In apparel, hemp appears in jeans and workwear, casual shirts, dresses, shoes and hats, usually blended. In industrial and home textiles it serves as canvas, webbing, upholstery, sacks and cordage. Buyers comparing hemp fabrics should ask about the blend ratio, the softening method and the yarn fineness, because two fabrics both labeled hemp can feel entirely different depending on how the fiber was retted and spun.