Shake up your t-shirt game with this fun take on the iconic adidas Trefoil. Meet Treffy: a furry version of the Trefoil come to life. Treffy makes a subtle appearance on the chest, but takes centre stage on the back of the tee to say goodbye to whatever you're leaving behind you. The all-cotton jersey material ensures all-day comfort. Our cotton products support more sustainable cotton farming. Regular fit. Ribbed crewneck. 100% cotton single jersey.