It is very light and durable as most parts are made from hard reinforced plastic and alloys.
The legs are retractable, There is also a mouse pad which you can pull out and push it back in.
Underneath the table, there is a piece of fibre glass which is strong enough to support the weight. The glass is transparent too, it also conduct heat and cool down the mac. The table is small, just bigger than the size of a mac which is really portable.