The Tech String Crop Top is a sleek style made from a high-stretch jersey to hug the chest. It ties behind the neck and at the back, alongside a hook-and-eye closure. Halter neck fastening Tie back and hook-and-eye fastening Cropped 7 Days Active, curated by Reiss, is a range of activewear for men and women, to inspire motion for the mind, body, and soul.