Vest by HIIT, Sleeveless solutions, Crew neck, Logo print to chest, Dropped armholes, Cropped, boxy cut, Relaxed fit, More room for activities. Look stylish without breaking a sweat with HIIT's drop of activewear. The label's monochrome palette plays out across a streetwear-inspired range of tops, leggings and sports bras all kitted out with breathable mesh panels and handy zip pockets.