Though he is provided with a straw mat, Matthew says he prefers to sleep on the concrete floor of his cell in the maximum-security wing of Singapore’s Changi Prison.

Inside a cell at Singapore's Changi prison, there's just enough space for a grown man to lie down. To sleep, inmates roll out a thin straw mat.

They are then led to one of three types of cells in Changi – a single-inmate cell around 7 sq m in area, a four-inmate cell of around 10 sq m, or an eight-inmate unit of around 20 sq m.

Though he is provided with a straw mat, Matthew says he prefers to sleep on the concrete floor of his cell in the maximum-security wing of Singapore’s Changi Prison. CNN values your feedback 1.

Single cells in stifling heat. Singapore’s Changi Prison Complex is a walled compound of guard towers and imposing gates built in the shadow of the country’s main airport.

Though he is provided with a straw mat, Matthew says he prefers to sleep on the concrete floor of his cell in the maximum-security wing of Singapore’s Changi Prison. “It’s more cooling that way,” says ...

Though he is provided with a straw mat, Matthew says he prefers to sleep on the concrete floor of his cell in the maximum-security wing of Singapore’s Changi Prison.

Though he is provided with a straw mat, Matthew says he prefers to sleep on the concrete floor of his cell in the maximum-security wing of Singapore’s Changi Prison.

Singapore (CNN) — Though he is provided with a straw mat, Matthew says he prefers to sleep on the concrete floor of his cell in the maximum-security wing of Singapore’s Changi Prison.

Singapore (CNN) — Though he is provided with a straw mat, Matthew says he prefers to sleep on the concrete floor of his cell in the maximum-security wing of Singapore’s Changi Prison. “It ...