It's a good idea to buy a mattress from a company that has been in business longer than its warranty.
Sheets
DreamFit Patented Linens – 300 & 400 Thread Count
DreamFit 300 Thread Count Sheet Sets
Twin – TwinLong – Std – Queen – E King – Cal King
DreamFit 400 Thread Count Sheet Sets
Twin – TwinLong – Std – Queen – E King – Cal King