Amazon.co.uk Price:  £19.11 (as of 10/08/2021 05:52 PST- Details) & FREE Shipping.

Delivers continuous gentle warmth, designed specifically to ease lower back pain
It features a reusable thermal core which microwaves in minutes and provides gentle, sustained heat for hours
CE registered as a Class 1 medical device, entirely reusable, non-invasive

Usually dispatched within 24 hours