Derby Laces Spark / Brown are 8mm wide skate laces with strong metallic fibers, high-performance braid and hardened plastic tips. Suitable for roller derby and other high-performance skating. Sold as a pair. Note: The dye from these laces may rub onto footwear and clothing during contact. Details Performance Metallics SPARK by Derby Laces create a natural friction when tightened to help them stay tied, tight, and where you want them while skating. Durable Fibers SPARK by Derby Laces are braided laces made out of metallic coated durable fibers. They have a unique texture that allows them to tighten and loosen easily. Attractive Colors SPARK by Derby Laces are available in a large variety of attractive colors and designs. We are constantly expanding our selection of colors and sizes. Hardened Tips SPARK by Derby Laces feature either a hardened plastic tip or a custom metal tip. Both are extremely durable.