The blue TPE 43D filament from 123-3D.ie is ideal for projects that require flexibility. In addition to being very flexible, this filament is also resistant to compression and high temperatures. The bond between layers is very strong, so your prints will have versatile mechanical properties. This makes TPE a popular material to work with. This filament has a diameter of 1.75 mm and there is 0.75 kg on the spool.
Read more about printing with TPE filament
here.