.blog_event-sponsors-slider img {
	filter: url('../js/filters.svg#grayscale'); /* Firefox 3.5+ */
	filter: gray; /* IE6-9 */
	-webkit-filter: grayscale(1); /* Webkit Nightlies, Google Chrome Canary and Microsoft Edge*/
}
.blog_event-sponsors-slider img:hover {
	filter: none; /* Applies to FF + IE */
	-webkit-filter: grayscale(0);
}