My husband has tried various other brands of socks ,none of which
remotely resembled the L/XL I chose for him.
He finds Posey socks comfortable and true to advertised sizing.

Silicone Fibre Heel Protector
Designed to provide comfort and reduce pressure build-up in the heel area, these heel protectors are filled with soft silicone hollow-core fibres for gentle yet effective support. The breathable design helps keep the feet cool, making them ideal for use in warmer weather. Sold as a pair, they offer lightweight, comfortable protection for at-risk individuals.
Key Features
• Padded heel cushion
• Provides comfort and assists in the prevention of pressure build-up in the heel area
• Manufactured from millions of silicone-coated cylindrical hollow-core fibres
• Silicone coating acts as a lubricant to eliminate friction and reduce shear forces
• Adjustable velcro securing straps
• Internal seams are carefully positioned to avoid creating pressure points
• Breathable cotton cover
• Machine washable
• Supplied as each