Without sand, or having no sand.
Sandless is good if you don't like sand, but bad if you want to build a sandcastle.
Examples:
The playground is sandless, so we can play without getting sandy.
I prefer a sandless beach because I don't like getting sand in my shoes.
The sandless desert was covered in rocks instead.
I wish this beach was sandless so I wouldn't have to shake out my towel.
A sandless beach is like a dream for people who don't like sand.
The sandless hourglass had no sand to measure the time.