The tournament standard Silicone chess pieces are ideal for chess clubs, schools and home use. The Material is the highest grade of soft 100% silicone which is ultra durable – just try to break them, you can’t! When dropped on the floor they bounce safely without any damage and also cause no noise. This set can be cleaned by washing it in warm soapy water.Each set comes with a complete set of chess pieces – 17 white pieces and 17 black pieces which includes 2 Extra Queens. Paired with our Deluxe Silicone Chess Mat (included) for the most durable chess set ever. Correctly sized for Tournament play, the green and white silicone board combines high durability with a lightweight practicality. Unlike cheaper PVC boards, this product can be folded, rolled or shoved haphazardly into a full backpack without any damage or creasing to the playing area. With a square size of 57mm (appropriate for sets up to 4 Inch king height) and algebraic notation, this board is perfect for players just starting out, or just starting to really study their chess. The pieces can be stored in our standard cotton bag (included) safely, along with the silicone mat which can be folded into the bag also.Chess itself is a problem. It is seen as a brainpower game. It is generally believed that people who play chess have high IQ. A survey of 4,000 students in Venezuela shows that after four months of chess education Both boys and girls and IQ have achieved significant improvement. It teaches planning and foresight.Young  playing chess helps develop brain planning, judgment, and self-control. Chess-based strategy games help brain development and make better decisions across a variety of situations throughout life. Leather chess game is a very unique mat chess game and over 100+ have being sold without any complain, so you are assured of what you are buying.