 Take the Helix Sleep Quiz and find your perfect mattress in under two minutes. And your personalized mattress is shipped straight to your door, free of charge. Helix offers a 100-night trial and a 10- to 15-year warranty to try out your new Helix mattress. Every Helix mattress has a hybrid design, combining individually wrapped steel coils on the base with premium foam layers on top. It's the perfect combination of comfort and support.