Hi Chelsea,
Good question. The jury is still out on cold caps. The is conflicting evidence about the effectiveness of cooling the head before, during or after chemotherapy to prevent hair loss. This article from the American Cancer Society sums it up plainly and in brief.
https://www.cancer.org/treatment/treatments-and-side-effects/physical-side-effects/hair-loss/cold-caps.html
I'm also tagging @leannz @cautiousoptimism @elvandi @shenriq @grandma41. Did any of you consider using cooling caps during treatment?