The By City London jacket is made of waxed cotton fabric and 100% waterproof and breathable HIPORA® removable thermo liner. The arms and waist are adjustable if you want to take the thermo liner out. Included are the removable CE certified "Flexishock" protections on elbows and shoulders. This CE approved, CE prEN17092-4:2018 Level A, jacket is the perfect companion to go comfortable and fashionable on the bike.