Self inflating mattress for pop-top (Charminster BH3)

Outdoor revolution 75mm foam self inflating mattress. 100cm wide - designed to fit pop top area of van. It must have a small leak somewhere because it reinflates even when the valve is closed. But I slept on it all last summer and it felt ok despite this. Giving away because it's slightly too wide for our campervan roof. Would be suitable for a VW or wider.