The Boker Plus Sigyn is a compact, lightweight neck knife designed by Andre Schröter. Following the design approach of earlier Midgards knives, it supports interchangeable handle scales that can be easily customized and 3D printed in various shapes, colors, and materials using a standard 3D printer. The knife features an ergonomic three-finger grip with durable G10 handle scales, enhanced by a subtle textured surface for a secure hold, even in wet conditions. A distinctive red fiber layer adds visual appeal, while thumb jimping improves grip and control during use. Its satin-finished D2 drop-point blade includes a decorative fuller, combining practicality with refined styling. Additional features include a lanyard hole, a ball chain for neck carry, and a precisely fitted Kydex sheath for secure storage and convenient everyday carry.