Consider the protective qualities and the flexibility of a piece of motorcycling apparel when shopping. A motorcycling jacket should be constructed from thicker leather than fashion clothing. Or choose a material like the sturdy Cordura nylons used by firms like Aerostich. It should be cut so that it's comfortable and covers well when you are sitting on your bike. The seams should be sewn tightly with tough thread, and the zippers should be rugged enough to stay together if you crash. The cuffs should fit snugly, so the sleeves won't leave your arms uncovered. A fold-down collar should be secured against flapping. To make it usable in a wide variety of temperatures, the jacket should, at the minimum, have some method of letting air pass through. A liner is also nice, but you can create your own with layers underneath the jacket—providing it isn't so snug that they won't fit. Useful features in a jacket are armor, adjustable cuffs, pockets that suit your habits, and collars that adjust or remove to alter wind flow and protection. The vented Firstgear jacket I took to Tucson probably looked oppressive to the uninitiated, but its vents (which include scoops on the sleeves to send air up there) not only admitted enough air to keep me comfy at 110 degrees, after closing the vents, it works down into the 40s. That flexibility means that its substantial leather will be available when I need it most.