closed even though some of his players have not had a turn to bat: this is a tactical decision by the captain, usually because he believes his team have scored sufficient runs and need time to dismiss the opposition in their innings the set number of overs (i.e., in a limited overs match) have been bowled the match has ended prematurely due to bad weather or running out of time in the final innings of the match, the batting side has reached its target and won the game. Overs The Laws state that, throughout an innings, "the ball shall be bowled from each end alternately in overs of 6 balls". The name "over" came about because the umpire calls "Over!" when six balls have been bowled. At this point, another bowler is deployed at the other end, and the fielding side changes ends while the batters do not. A bowler cannot bowl two successive overs, although a bowler can (and usually does) bowl alternate overs, from the same end, for several overs which are termed a "spell". The batters do not change ends at the end of the over, and so the one who was non-striker is now the striker and vice versa. The umpires also change positions so that the one who was at "square leg" now stands behind the wicket at the non-striker's end and vice versa. Clothing and equipment The wicket-keeper (a specialised fielder behind the batter) and the batters wear protective gear because of the hardness of the ball, which can be delivered at speeds of more than and presents a major health and safety concern. Protective clothing includes pads (designed to protect the knees and shins), batting gloves or wicket-keeper's gloves for the hands, a safety helmet for the head and a box for male players inside the trousers (to protect the crotch area). Some batters wear additional padding inside their shirts and trousers such as thigh pads, arm pads, rib protectors and shoulder pads. The only fielders allowed to wear protective gear are those in positions very close to the batter (i.e., if they are alongside or in front of him), but they cannot wear gloves or external leg guards. Subject to certain variations, on-field clothing generally includes a collared shirt with short or long sleeves; long trousers; woolen pullover (if needed); cricket cap (for fielding) or a safety helmet; and spiked shoes or