I've been creating combo fills like this in my productions for a long time. Eventually people started creating them as well and packaging them- as well making them even better. Hy2rogen is one of those guys. Their stuff is always on point and this set of combo fills is top notch. There's loads to choose from and everything is of great quality- NO filler. This is a like a producers secret weapon... just add these fills and it will make you sound better...lol.