Yasmin 4' Small Double Roll-Up Mattress 20cm (Pocket Spring) Non-Woven Bottom? Yasmin 4' Small Double Roll Up Mattress 20cm Pocket Spring Comfort Upgrade your sleep with the Yasmin 4' Small Double Roll Up Mattress, featuring a 20cm deep pocket spring system and a durable non woven bottom for long lasting support. Each pocket spring works independently to respond to your body, reducing motion transfer and providing a more comfortable nights rest. Delivered rolled and vacuum packed, this mattress is easy to transport and set