Size: Approximately 33 x 40cm The shape fits snugly against the lower back, and the high elasticity and resilience unique to latex material disperses pressure from the lower back to the back. What is latex? It is a natural material processed from the sap of rubber trees. It has excellent elasticity and resilience, and is suitable for cushions because it is resistant to sagging. Also, natural latex is a material that is more environmentally friendly than conventional materials. Please refrain from using this product if you have been diagnosed with a latex allergy by a doctor in the past, or if you have experienced any symptoms after coming into contact with natural latex. #EasyOnTheBack #Cushion