Sleeping on a six-inch mattress might be feasible, but it's not advisable due to several reasons.

When it comes to children's bedding or furnishing small spaces like RVs or spare rooms, six-inch mattresses might just be the perfect solution. These mattresses, which measure six inches from the base to the top cover, offer a compact profile and are available from several sleep brands.

However, it's important to note that six-inch mattresses often have a firmer feel and might not be suitable for side sleepers or those seeking a significant amount of cushioning. In fact, most six-inch mattresses sit at the harder end of the mattress firmness scale.

One popular six-inch mattress model is the Lucid 6-inch low profile mattress. For those who prefer brand names, the Helix Kids mattress and the BB Kids mattress from Brooklyn Bedding are also available in a six-inch build.

When choosing a six-inch mattress, quality materials are paramount. Look for dense foams or reinforced springs to ensure durability and support. It's also crucial that these mattresses have support layers, either a sprung base or a base layer of durable foams.

Six-inch mattresses are often compared to thin, hard Japanese floor mattresses or shikibuton due to their minimal padding and firm support. This makes them a suitable option for children or those seeking a thin, firm comfort. However, they might not provide enough support for heavier individuals or bed sharers due to the lack of cushioning.

In both RV and spare room scenarios, the mattress will not be used frequently. This makes six-inch mattresses a practical choice, as they are often simple with limited types of foams, springs, or specialist features.

It's worth mentioning that traditional Japanese floor mattresses are designed to be rolled up and stored, which is not a feature of six-inch mattresses.

When it comes to kids, a firm or medium-firm mattress can benefit their spinal development. However, it's essential to remember that kids don't have the same support needs as adults, making it possible to focus on quality materials rather than extra inches.

The best place to find a six-inch mattress is through retailers such as Amazon and Walmart. However, many of the best mattresses in a box are not available in six-inch builds, so it's important to do thorough research before making a purchase.

In conclusion, six-inch mattresses can be a great choice for children or those looking for a compact, firm mattress. Just remember to prioritise quality materials and support layers to ensure a comfortable and supportive sleep.

Sleeping on a six-inch mattress might be feasible, but it's not advisable due to several reasons.