While it is not illegal to ride a motorcycle without a jacket in most places, it is strongly recommended to wear a motorcycle jacket for safety reasons. Wearing a jacket provides important protection for your upper body in the event of a fall or accident.
A quality motorcycle jacket is designed to offer abrasion resistance, impact protection, and can also provide insulation and weather protection. It helps shield your skin from road rash, cuts, and bruises that can occur in an accident. Additionally, jackets often include padding, armor, or reinforced areas to protect your shoulders, elbows, and spine.
In many jurisdictions, helmets are legally required for motorcycle riders due to the significant safety benefits they provide. Although there might not be a legal requirement for a jacket, it is strongly advised to prioritize your safety by wearing one along with other appropriate safety gear such as a helmet, gloves, pants, and sturdy footwear when riding a motorcycle.