Vitamin Sea Plain Dye Housewife Pillowcase Grey Soft, breathable and skin friendly - are you getting enough Vitamin Sea? The sateen weave of this cotton and SeaCell™ sheet set is redefining beauty sleep with SeaCell™. SeaCell™ is a lyocell fiber derived from Icelandic sea algae, known to fight free radicals and contains rich nutrients that are friendly to skin. Available in two solid dyed colors of grey or white.