The following car seats are compatible with the Silver Cross Wave stroller with purchase of the upper car seat adapter or lower car seat adapters. You'll need the lower car seat adapter if you're using the stroller with twins or attaching the infant car seat to the lower position.
Cybex Aton, Aton 2*, Aton Q and Cloud Q*
Maxi-Cosi Mico 30, Mico Max 30, and Mico Max Plus
Nuna PIPA, PIPA RX, PIPA Lite, PIPA Lite R, and PIPA Lite LX
The Aton 2 and Cloud Q are not compatible in the lower car seat adapter setting.