Great-value 3-pack of low-rise trainer socks, or shoe-liners as they are often called. Bestselling Calvin Klein Coolmax trainer socks in a mix of colour - fiery red, storm grey and black. Designed to hide neatly inside your trainers, these breathable socks are made with Coolmax technology that moves moisture away from your skin to keep you cool and fresh. Heel gripper for superior fit. To fit UK shoe size 6.5-11.0 (Euro 40-46).