Instant purchase is OK. Price negotiation is OK. Ergonomically designed for breathability and comfortable seating. Butterfly-shaped posture correction cushion I used it a few times for a short period after purchase, but I haven't used it since, so I'm selling it. I will ship via Mercari's anonymous delivery service. The price will be slightly increased after the Mercari sale ends. Simple packaging with only water damage protection. - Color: Pink - Weight: Approximately 740g - Features: Good breathability, soft seat - Design: Ergonomic shape Thank you for viewing.