Most importantly, the opening batters must face a new ball, which is hard and has a pronounced seam. This makes it more liable to travel fast, bounce high, seam around (i.e., bounce unpredictably off the seam) and swing (i.e., deviate sideways when travelling through the air). These early conditions favour the bowling team, so the opening batters must have considerable patience, a sound technique and be good defensively. As the ball gets older, its condition starts to favour the batting team. Therefore, the openers will ideally stay at the crease long enough to protect the batters further down the order.