Sashiko thread
Sashiko is traditionally sewn with a special cotton thread that is slightly thicker than regular sewing thread. The thread usually has a matte appearance and is adapted for the clear, decorative stitches that characterize the technique. The slightly thicker thread makes the stitches clearly visible in the fabric and gives the embroidery its characteristic expression.
Traditionally, white thread is used on indigo blue fabric, but today sashiko thread is available in many colors and lengths. The thread is often sold in shorter skeins, such as around 20 or 40 meters, and is manufactured by Japanese companies that specialize in sashiko materials, among others.
Sashiko needles
Sashiko needles are different from regular embroidery needles. They are usually longer, stronger, and have a larger eye to accommodate the thicker sashiko thread. The long needle allows you to pick up several small stitches on the needle before pulling the thread through, which is typical of how sashiko is sewn.
The needles are also made to be able to go through slightly heavier fabrics without bending or breaking. They therefore often have a sharp point and are made of hardened steel to withstand repeated stitches through multiple layers of fabric.
Materials often used together
Sashiko often uses simple materials: cotton fabric, sashiko thread, and a special sashiko needle. Many beginner kits include these items along with a fabric with the pattern already marked. Once the embroidery is complete, the markings usually disappear in the wash.