Synthetic Silk (Synsilk).
Elastic strap with pull cord to keep sheet firmly in place on edges.
Buckle strap wraps underneath the mattress to keep the sheet tight.
Fitted holes for valves to fit through.
17 x 9 cm.
Team Thoughts: Fits perfectly on the BlackWolf HexaTherm 2D Super Deluxe Single Mattress, super soft material, and easy to use.