How does it attach to my mattress? March 11, 2019 14:18 Updated Follow We've included a non-slip base and four elastic straps to secure it nice and tight to your mattress. Related articles What is inside the topper, are there different layers like the mattress? Which courier do you use? How much is delivery? Can I store the topper when I'm not using it? Is the feather and down filling sourced ethically?