Seagrass Tent. It's a Tunnel! It's a Mat!
Made entirely of natural seagrass mats fastened together with sisal string
Lightweight and fits easily in many cages and playpen areas.
Ships flat but designed to open up to a tunnel without collapsing.
 
Approximate dimensions:
Tent/Open: 30cm x 30cm x 26cm height
Flat/Mat: 45cm x 30cm x 2cm thick