Esker Dry Brush Our Dry Brush is made of grass tree wood, all-natural bristles, and finely wound hemp twine at the handle. Dry brushing is an ancient technique that improves circulation throughout the body and exfoliates the top layer of skin for a brighter, firmer surface all over. The head of bristles on our dry brush are soft to the touch and move easily across the body without any harshness. Our brush can be used across the entire body including arms, legs, and torso. Approx. 8&rdquo.