Gryffindor: 73% Cotton 26% Polyamide 1% Elastane Hogwarts: 74% Cotton 24% Polyamide 1% Elastane Triwizard: 73% Cotton 25% Polyamide 2% Elastane. Each of the three styles of Harry Potter socks in the set is very fun, individual and colourfully made, knitted using quality cotton rich blends of fibres that give them bright colours, a soft feel, durability and a great fit!