Slipknot are having trouble keeping a new T-shirt in stock. It's a tribute to bassist Paul Gray, who died of an overdose last year.

It has a number 2 on the front and Gray's picture on the back. A day after it went on sale, it sold out of every size but smalls and mediums.

 Slipknot is donating the proceeds from the sale of the shirt to Musicares, which helps struggling musicians.