85% cotton, 15% polyester. Cotton jersey fabric. œ zip fastening. Kangaroo pocket. Drawcord hem. Regular fit. The Derby Half Zip Sweat from Kestin is one of those partially-zippered Japanese cotton jerseys that are comfortable enough to roll around the sofa in, but also highbrow enough to meet the parents, with its smart-looking collar and those slightly-tapered sleeves. It also has one big stomach-sweeping kangaroo pocket that has the potential to house a whole wealth of crisp packets and sweet-treat wrappers. Also comes with a colourful woven drawcord at the hem to regulate the air flow.