The definition of chillwave varies, but here we're talking about the sound popularized by Odesza, Flume, and San Holo.
What types of presets?
There are basses, keys, leads, pads, plucks, and synth sounds included.
What do I need?
You just need a copy of Massive X! Massive X is a synthesizer created by Native Instruments, released in 2019. You just drag these presets into your user folder. Will not work in the old regular Massive.