The chest extender is ideal for horses that are between two sizes or have a wide chest. This externers is suitable for QHP rugs that feature clasps at the chest. The chest extension is ideal for horses that are between sizes or have a broad chest. This extension is suitable for QHP blankets with breast clasps. Fabric composition outside: 100% polyester. Fabric composition inside: 100% polyester nylon. Fastening material: iron. Breast extension with male-female fastener. 150-gram polyester fiber padding. Made of wear-resistant 600D rip-stop fabric.