Float
float-{left, right, none}
Float left on all viewport sizes
Float right on all viewport sizes
Don't float on all viewport sizes
Float & Breakpoints
float-{breakpoint}-{left, right, none} =
float-{sm, md, lg, xl}-{left, right, none}
.float-sm-left .float-md-right
.float-md-right .float-xl-none