These are a great alternative to Purple-branded sheets for the Purple Mattress. They feel nice, they go on easily, and they stay on the bed.
Purple Mattresses need "stretchy" sheets to realize the full benefits of the materials. Purple-brand sheets are stretchy and soft, but very expensive and pretty light weight and sheer. Also, the Purple-brand fitted sheet is NEARLY IMPOSSIBLE to put on the king size Purple Mattress. It's ridiculous how tight the sheet fits.