<img class="img-responsive dw-mobile" src="https://cdn.shopify.com/s/files/1/0997/6284/files/fusion_banner_mobile_1.jpg?v=1594900049"> code example

Example: bootstrap Image thumbnails

In addition to our border-radius utilities, you can use 
.img-thumbnail to give an image a rounded 1px border appearance.

<img src="..." alt="..." class="img-thumbnail">