Most of the Troy Lee Designs base protector shirts looked like T-shirts with padding inside. I tried the 7850-HW shirt and it fit like a glove. The padding is almost weightless, so you don't even feel it. The padding is divided into small sections, so it moves with you. Many pieces of the padding are removable too, so it can be custom fit with your gear. For example, I removed one pad and my neck brace fit perfectly. The base protector shirts have padding not only on the front and back of your torso, but the sides as well. One less area for a shift lever, foot peg or handle bar to poke you. To keep cool, the shirt is made of a light breathable material, has a wide neck opening and open arm pit design. The base protector shirt is designed to go under your jersey. Your mom will be thrilled that it is machine washable too.