In recent years, many ski resorts have introduced terrain parks where skiers and snowboarders can attempt tricks. These parks include many features like rails, boxes, jumps, hips, quarterpipes, and halfpipes. It is now quite common for 'Newschool' skiers to use urban features in towns and cities to perform tricks also done in the snowpark. A popular choice of equipment for this terrain is the twin-tip ski. Twin-tip skis come in all shapes and sizes, and were originally made specifically for newschool skiing. The varieties of twin-tip skis are now more versatile, being marketed towards skiers of all styles and abilities. Twin-tip skis are turned up at both ends to allow for both regular (forwards) and switch (backwards) skiing.