vientos-iconset

IcoMoon.io

Go to https://icomoon.io/app/#/select
Import Icons (icomoon/selection.json)

approve to load settings

Modify selection
Generate SVG & More (Download) make sure to select Polymer checkbox in settings (gear icon)
Overwrite

cp <unpacked-archive>/selection.json icomoon/selection.json
copy entire <svg>...</svg> element from <unpacked-archive>/icomoon-polymer/icomoon-iconset-svg.html and replace with it one in vientos-iconset.svg
remove all class="path1" from replaced svg