• it's all go, it's all the go, it's quite the go
• aerial gliding was the latest craze
• fashionable, fine, hip, smart, snappy, spicy, stylish, swell, trendy
• fashion-book, fashion-magazine
• to come in, to come in fashion, to take on
• antiquated, outmoded, to be out of fashion
• to be at a premium, to be in, to be in fashion