The style and cut of jeans can also enhance their sexual appeal to fetishists. Jeans without pockets on the back are often viewed as showing off one's buttocks and therefore more flattering. Stretch jeans are often viewed as attractive because they have the appearance of being skin tight, while not binding like regular denim jeans would. An extreme example of fetish denim would be "Zip Around Jeans", so called because their zipper unzips starting in the front and continues all the way to the back. Other popular styles include the lace up jean and multi button style jeans. There is a current resurgence, spreading at an alarming rate of 'pop rockers' and the sort wearing tight jeans or 'TREGGINGS' as they have come to be known.