75% water mattress

There are two main possibilities for what “75% waterbed mattress” might refer to:

• Reduced Wave: It could indicate a waterbed mattress designed to have a reduced wave motion compared to a traditional fully filled waterbed. This might be achieved by filling the bladder to only 75% of its capacity, creating a firmer feel with less wave action.
• Hybrid Construction: It could also refer to a hybrid mattress that combines a water bladder filled to 75% capacity with other support layers like coils or foam. This type of mattress would offer some of the conforming comfort of water with the added support and structure of traditional mattress materials.