These cotton-rich t-shirt vests add a snug extra layer on cooler days. Regular fit, with added Lycra® for an effortless 4-way stretch. Our Cool Comfort™ fabric draws moisture away from the skin to keep you comfortable, while our antibacterial Cool & Fresh™ technology gives an all-day feeling of freshness. All of the cotton for our clothing is sustainably sourced and always will be. M&S Collection: easy-to-wear wardrobe staples that combine classic and contemporary styles.