Sleeping mats made of foam are very popular and affordable, and can be used over an aluminium sleeping mat.
Buy a foam sleeping mat online here.
When you have to sleep in a tent it's crucial that you lay on something soft. You can be sure that your body will thank you for it and you will be comfortable throughout the night.
The foam sleeping mats are qualitative and easy to transport. They can be rolled together and that way they take up minimal space.