Here is an affordable alternative to the da Vinci Pocket Sable Brush. The brush is made with da Vinci Cosmo Top Spin Synthetic which is a superior performing synthetic brush. If budget is a concern, this brush will serve you well for outdoor sketching, travel and studio.
The black plastic body acts as a handle. Then screws off to cap the brush at the other end. The hair is concealed and protected within the body of the brush. There is a tiny hold drilled into the end of the handle to allow the hair to dry while the brush is capped. Thank you da Vinci brush. You think of everything.