Rayon from Bamboo Imported Temperature regulating and moisture wicking No formaldehyde or flame retardant chemicals Set includes 2 king pillowcases at 21"x40", 1 king flat sheet at 110"Wx113"L, and 2 twin xl fitted sheets with elastic all the way around at 39"Wx80"Lx18"D Resists bacteria, mildew, odors, and mites Hypo allergenic and indescribably soft BedVoyage Bed Sheets are 100% Rayon from Bamboo, are subtly cool and extremely breathable, with a feel softer to the touch than a 1,000 thread-count Pima cotton. The linens will not pill nor fade. Rayon from Bamboo is an easy care and durable fiber, and those with sensitive skin will benefit from the round fibers which are extremely smooth against the skin. Sheet sets include a deep-pocket fitted sheet, a flat sheet, and two pillowcases (1 for Twin size).