If you're considering a Leesa mattress with an adjustable base, whether you need a split setup depends on your preferences.
If you want both sides of a King bed to be fully customizable—like having different positions or experiences for each side—you’ll need two Twin XL mattresses to create a split King setup. This allows each side to move independently, perfect for couples with different sleep needs.
Prefer a single mattress? For King or California King sizes, the two bases can sync to operate together, offering full adjustability with one mattress.
It’s all about what works best for your comfort and lifestyle!