DreamFit® fits your Mattress...and your Lifestyle...like a Dream. Our Seven Degrees System allows you to choose your own Degree depending on your lifestyle and comfort needs. And every Degree offers our patented Guaranteed To Fit & Guaranteed To Stay On™ features, allowing you to "self-tailor" your sheets to any mattress height, giving them a perfect fit. All DreamFit® sheet lines are made with the following Quality Features: •Patented DreamFit® Guaranteed To Fit & Guaranteed To Stay On.™ construction fits any sized mattress. •High Performance Elastic sewn around entire sheet- 4X wider and 20X stronger than standard elastic. •Patented strap design guarantees your DreamFit® fitted sheet will stay put even with the addition of feather beds, mattress toppers, or foam. •One-Year Limited Warranty