Cricket was played during the 16th century in England, though it may have Dutch or Flemish origins. By the 18th century cricket had become the national game, with straight-sided bats being used to face balls delivered by bowlers who, rather than rolling or skimming the ball, took to pitching it instead, roundarm at first, then overarm. A single stump was replaced by three stumps and the 'leg before wicket' (lbw) ruling was introduced as the game expanded. The British introduced cricket throughout the then empire and beyond during the 19th century, with the first international match played between the United States of America and Canada in 1844. The first Australian touring team to play in England was composed of Aboriginal stockmen in 1868, and the 'Ashes', a tiny urn of burnt stumps, have been hotly contested by the two countries since 1882. The game of cricket is traditionally played in 'whites' for test matches between nations, but with the introduction of the shorter, limited over game of 20/20, or twenty overs a side has come coloured kit at county and international level. A high level of protection is needed, even at school and club level. Batting pads, specifically designed wicket-keeping pads, helmets with faceguards and various body protectors are worn to prevent serious injury, especially around the groin area. Protective gloves protect the hands and wrists from impact when facing the bowler, with special gloves for wicket-keepers as well. Cricket bats come in different sizes and weights to suit different players, from junior level to senior. With so much equipment, clothing and protection needed, a cricket bag is needed to transport the items to and from matches. The larger bags have wheels to avoid carrying heavy bags, but some models are designed as rucksacks to spread the weight across the back.