Build fun outfits from the ground up with these cotton-rich trainer liners, featuring our very own Percy Pig™. Seamfree for total comfort against skin and come with a reinforced heel and toe for added strength and durability. Freshfeet™ technology keeps odours at bay. Added stretch ensures a flexible feel. We only ever use responsibly sourced cotton for our clothes. M&S Collection: versatile styles in modern shapes with unique and playful details.