A tube mascara wand typically features a hollow, flexible silicone or plastic brush designed to coat lashes evenly while minimizing clumping. The bristles are often short and closely spaced, helping to define and separate lashes while providing a smooth, tubing effect. This type of wand is commonly used with tubing mascaras, which wrap each lash in a polymer-based formula for long-lasting wear and easy removal with warm water. The sleek design allows for precise application, making it ideal for lengthening and defining lashes.