Align Pilates Curved Pro Sitting BoxThe Align Pilates Curved Reformer Sitting Box is a versatile accessory that enhances comfort during seated and prone supine (lying face down) exercises. This box helps to deepen stretches, engage the core, and promote precise muscle targeting. The curved design supports the natural curve of the spine, making long box exercises more comfortable while also improving comfort in the supine position. Slightly smaller than the Pro Sitting Box, this version