Which tool is commonly used to create soft, blended layers in hairstyling?

Thinning shears are specifically designed to remove bulk from the hair while creating soft, blended layers. They have one blade with regular cutting edges and the other blade with teeth, which enables them to cut some strands while leaving others intact. This selective cutting is what allows hairstylists to achieve a more layered and textured look, rather than a blunt or heavy appearance.

While a comb is integral for sectioning and distributing hair evenly, it does not inherently create layers. A round brush is primarily used for styling and adding volume, and a straightening iron is used to achieve smooth, straight hair. Neither of these tools is suited for blending layers in the same effective manner that thinning shears provide. Thus, the unique design and function of thinning shears make them the appropriate choice for creating soft, blended layers in hairstyling.