@walkinggirl
I'm thinking about getting a pad to put between my shoulder and the strap.

@walkinggirl There are commercially available lamb's wool seatbelt covers that fit around the seatbelt where the pacemaker/ICD would be, these range in size from 5-6 inches long to larger, and range in price from $5.00 or so up to $25-30 depending on the size, thickness of the seatbelt cover. You can see the variety of these for sale by googling "lambs wool seatbelt covers"- looks like sites like Amazon, Walmart and Etsy show the largest variety and price ranges. I got a relatively small one years ago at Walmart, think I paid about $3.00 and change for it. I put it on the seatbelt of the car I drive most frequently, but found that the seatbelt doesn't rest on the area where my pacemaker is.