For choosing of a bow (violin bow, viola bow, cello bow, double bass bow) there are many criteria. The bow is as important as the instrument (violin, viola, cello, double bass) itself. So one can say it with the famous words by violinist Battista Viotti: "The violin, that is the bow". Also the selection of the appropriate rosin plays an important role.
In the relaxed state, the rod of the bow should be nicely curved. When the bow is stretched, the rod should still be curved and not straight. Only then the bow has the necessary tension to bring the sound of music to the strings.
A key point is of course the stringing of the bow with hair, usually made of horsehair. The hair layer must not be too thin. On the hair there are small barbs. At these barbs rosin keeps sticking. If the bow was played for a while, you have to replace the stringing. This can be done by a professional. The bow hair should never be touched with your fingers, because then it greases. Then the rosin can no longer get stuck. If once in a while dirt and grease are stuck near the frog, you can clean the bow hair with some special cleaning products.
Bow, rosin, strings and instrument as well as many accessories are all available at Paganino, Your online-shop.