What is a flatlock machine?

A flatlock machine is a type of sewing machine designed for creating flat seams, often used in sewing athletic wear, undergarments, and other garments where comfort and stretch are essential. It operates using a special stitch formation that interlocks the fabric layers, resulting in a smooth, flat seam that minimizes bulk and reduces chafing. This machine is particularly valued in the production of knit fabrics, as it allows for high elasticity and flexibility in the seams.