Jack and Jones Sum Lightweight Jacket. Jack and Jones Core Sum Lightweight JacketStay Stylish with the Sum Lightweight Jacket from Jack and Jones. Featuring a full zip, 2 press stud front pockets, a hood and elasticated trims. The look is completed with the Jack and Jones Branding.> Men's Jacket> Full Zip> Hood> 2 Press Stud Front Pockets> Touch Close Inside Pocket> Embroidered Logo> Jack and Jones Branding> Shell: 100% Polyester> Lining: 100% Polyester> Machine Washable