This DreamFit World Class Collection is unrivaled in quality and value using 60% cotton and 40% polyester. The DreamFit patented technology features high performance elastic corner bands with a “Guarantee to Fit and Stay On” your mattress. Extra wide / Extra long DreamFit linens provide a secure tuck, full body coverage and supreme comfort. Own these DreamFit sheets and discover complete comfort and the truly restful sleep! All DreamFit™ sheets will fit between a 7" - 17" thick mattress. Sheet Sets include: 1 flat top sheet, 1 fitted bottom sheet, 2 pillow cases (1 pillow case for twin size). Machine wash and dry.