https://knittedknockersonline.org/products
KnittedKnockersUSA.org provides FREE Knitted Knockers to women who have had a mastectomy.

Knitted Knockers are a light comfortable knitted prosthetic that when placed in a bra has the shape and feel of a real breast, and are more comfortable than silicone prosthetic breasts. These are made and donated by volunteers across the country and distributed FREE to mastectomy patients.