9. I - Interlock knit A rib stitch variation, interlock stitch fabrics are thicker, heavier and more stable than single knit constructions.
- Italian Nylon A very high quality knit fabric with 4-way stretch that comes from Italy. Italian nylon includes some lycra to give great stretch and recovery, abrasion resistance and anti-bacterial qualities.
10. J - Jacquard Any fabric that has a pattern woven into the fabric rather than printed on it is a jacquard. Brocade and damask are types of jacquard woven fabrics.
- Jacquard Knit A double knit fabric in which a Jacquard type of mechanism is used. This device individually controls needles or small groups of needles, and allows very complex and highly patterned knits to be created.
- Jersey A generic term for a plain knit fabric without a distinct rib. Originally made of wool, jersey fabric was first manufactured on the island of Jersey.
11. K - Knit Knit fabrics are made the same way a knitted scarf is made by someone at home with two needles and a ball of yarn.
12. L -Lamé A woven fabric using flat silver or gold metal threads to create either the design or the background in the fabric.
- Latex Latex is made with rubber and thus has rubber-like qualities. It is used in some elastics to provide greater elasticity.
- Linen A fabric made from linen fibers obtained from inside the woody stem of the flax plant. Linen fibers are much stronger and more lustrous than cotton.
- Lining The name given to material sewn into the inside of a garment to make it more opaque or more comfortable against the skin. Lining fabrics can be made of natural or man-made fibers.
- Lycra Lycra is the trademarked spandex fiber produced by DuPont. It is lightweight and soft, but stronger and more durable than rubber and is used in compression garments, swimwear and bras.
- Lyocell Lyocell is a cellulose fabric obtained by an organic solvent spinning process. This fabric is a sub-category of rayon. Tencel is the trademark name for lyocell.