Kit - cut it out, sew two pieces together, and fill. Size variable.
In the SilkLab at Tufts University bioactive inks have been developed that can function as a sensor either of the body wearing a garment printed with the ink or the environmental conditions surrounding the object printed with the ink. Amazing stuff. https://www.youtube.com/watch?time_continue=47&v=DM8JzVIN5Vo&feature=emb_logo 'The technology builds upon earlier work by the same researchers developing bioactive silk [...]
Such a complicated relationship with pigs made even more so and with serious implications! https://www.nature.com/articles/d41586-019-01169-8