Two techniques to shuffling cards in sleeves are the brick shuffle and the sleeve shuffle. These are not shuffling methods that casinos use. To do a brick shuffle, put your deck of cards in one hand and use the other hand to quickly move stacks of cards into different places in the deck. The brick shuffling technique has the propensity to warp the cards. To execute a sleeve shuffle, divide the deck of cards into two stacks and then thread the two stacks into one another using gentle pressure. The sleeve shuffle can only be done in sleeves because if it is not done that way, it will damage the cards.