Supima® cotton is the key ingredient in Casper Sheets. Supima® is one of the longest cotton fibres in the world. It's 35% longer and 45% stronger than regular cotton, which means the fibre is even softer and more lustrous wash after wash. It's a big part of what makes the Casper sheets naturally soft. You can trace the cotton directly to the source.
Supima® is a trademarked name for textiles woven from 100% American Pima® cotton and is only grown in Texas and California. The Supima® cotton used in Casper sheets comes from a farm in California's Central Valley.