Which house are you? This piece of official Harry Potter merchandise shows the iconic Slytherin crest from the classic Harry Potter saga on an officially licensed pair of boy's pyjamas. Our officially licensed boys pyjama set features a crew neck t-shirt with short sleeves and long, comfortable pyjama bottoms and is made from cotton elastane. Popgear is your one-stop-shop for all your character merchandise and clothing needs - we are totally committed to providing you with quality products that you will love.