John Lewis Specialist Synthetic Cluster Memory Foam Standard Support Pillow, Firm
SERTA Down Illusion Soft Hypoallergenic Firm Bed Pillows for Sleeping (2 Pack), King, White 2 Piece : Amazon.co.uk: Home & Kitchen
Silentnight Memory Foam Pillow - Firm
Cosmoluxe Hotel Collection Bed Pillows for Sleeping King Size 2 Pack, Firm Down Alternative Pillows King Size (20"x36") Set of 2 for Side, Stomach and Back Sleepers, Dark Green Piping : Amazon.co.uk:
Molblly King Size Pillows 2 Pack Shredded Memory Foam Bed Firm Pillows for Sleeping Set of 2 Adjustable Loft Pillows with Washable Hypoallergenic Cover for Back and Side Sleeper King Pillows 36"×20" :