Such a lot of alternatives with this collection of waistcoats and slipovers

 Knitted in 8ply

Every baby needs a vest of some kind all year round.
The C5 cable instructions are a little different (see the data page), but that’s easily managed.
Every other set of cable centres is filled with seed (UK: moss) stitch.
The different neck treatments are just perfect, and the design works ideally well for boys or girls. Just don’t pick a really busy yarn– you’ll lose the detail.