The Purple® Mattress cover includes an incredible knit design. The cover's fabric content varies from mattress to mattress. 

PurpleFlex

• Top: 100% Polyester
• Non-Slip Bottom: 65% Rayon, 35% Polyester

Purple Mattress

• Top: 98% Polyester, 2% Spandex
• Non-Slip Bottom: 74% Polyester, 26% Acrylic Latex

PurplePlus

• Top: 98% Polyester, 2% Spandex
• Non-Slip Bottom: 74% Polyester, 26% Acrylic Latex

Restore

• Top: 97% Polyester, 3% Elastic
• Side fabric: 100% Polyester
• Bottom cover: 65% FR Rayon, 25% Polyester, 10% Sheath/Core

Restore Plus

• Top fabric: 97% polyester, 3% elastic
• Side fabric: 100% polyester
• Bottom cover: 65% FR Rayon, 25% polyester, 10% Sheath/Core

RestorePremier

• Top fabric: 97.5% polyester, 2.5% elastic
• Side fabric: 100% polyester
• Bottom cover: 65% FR Rayon, 25% polyester, 10% Sheath/Core

Rejuvenate Mattresses

• Top Panel: 84.5% Polyester, 12% Viscose, 3% Lycra

• Gusset: 57% Polypropylene, 43% Polyester

• Side panel: 100% polyester

To clean the cover, spot clean with mild detergent (e.g.: upholstery cleaner). I would not recommend machine washing the cover.