Selective Laser Sintering (SLS) is a 3D printing process that utilizes a laser to fuse together small particles of thermoplastic material into a 3D object. The laser selectively fuses layers of powder particles together, one layer at a time, to create a 3D object. The process is similar to traditional 3D printing, but instead of using an inkjet-style printer head, it uses a laser to sinter the powder particles together. SLS is an incredibly accurate and efficient process, allowing for the production of higher-quality parts with greater speed and precision than other 3D printing techniques.