Nontoxic Symple Stuff King Size Mattresses

Kingsize (5')

This unique black border mattress has a deep quilted cool-touch cover providing the sleeper with a soft feel. Consisting of a traditional open coil Bonnell spring unit with a layer of open cell next-generation memory foam for extra support and comfort so you the sleeper can wake up feeling refreshed for the day ahead of you. Allow the foam to shape to your body and relieve pressure from building, supporting your neck, shoulders and legs. The mattress has hypoallergenic fillings with anti-dust mite protection for a healthier cleaner sleeping environment, it also comes with an anti-bacterial and non-sleep panel making the mattress single-sided. Simply rotate it every couple of months to keep it in pristine condition. With our new innovative technology, your mattress will come vacuum packed, rolled, and boxed for the customer's convenience and making much more environmentally friendly.

Bought for my child’s bed. They love it. It is still just as comfortable as the day it came. Great buy. Zakiya. London, GB. Sat Apr 25 2026

Kingsize (5')

With a breathable design to ensure a fresh and comfortable night's sleep, this mattress is an ideal finishing touch for any bed. The mattress has an open coil spring design with a soft surface for those who prefer a softer level of support. It is available in a range of sizes to suit your bed.

I haven’t tried it for a night yes but seem comfortable enough. Anonymous. Thu Mar 20 2025

Kingsize (5')

This product has been carefully designed with a combination of a European-engineered open coil spring system with a layer of the new innovative natural foam memory fiber, with a depth of 7.5” inches (18cm approximately). The open coil spring system allows the weight to be distributed evenly across the mattress to provide extra comfort and support for the sleeper for a comfortable night’s sleep. The mattress has a micro-quilted cool touch and a classic straight-line design top panel with a layer of cutting-edge visco-elastic memory foam, the foam softens when you lay it and maintains the body at a cool temperature. The memory foam adapts and shapes to the contours of your body, relieving pressure from building. The mattress has hypoallergenic and anti-dust fillings and an anti-bacterial feature making the mattress a cleaner healthier sleeping environment for the sleeper, and great for asthma sufferers. With our in-house technology, the mattress will come perfectly vacuum-packed, rolled, and boxed for the convenience of the customer. We do recommend once you have unpacked the mattress leave it for up to 48 hours so the mattress can re-size to its original.

Great for a starter mattress for kids. Donna. Belfast, GB. Fri Jan 09 2026

Kingsize (5')

This stylish orange wavy Bonnell spring memory foam mattress is great value for money carefully hand-made in the UK. It features a super smooth cool touch top panel cover, keeping the sleeper's body at room temperature for a much cooler night's sleep. The mattress core contains a 13.5 gauge patented ultra max diameter open coil Bonnell spring unit which distributes weight and pressure over a large area improving comfort and support. With a layer of high-quality layer of open cell Memory Foam which allows your body to shape and adapt to the mattress supporting the sleeper's body to relieve pressure from building for an excellent night’s sleep. Featuring an 18cm deep base with a stylish orange quilted border, with hypoallergenic and anti-dust mite fillings. This mattress is single-sided so no need to flip it, just rotate it every couple of months, to keep it in pristine condition. With the new innovative technology, the mattress will be vacuum-packed, rolled, and boxed for hassle-free delivery.

It's ok, it's fair for the price. Better than what we had and that was the main thing. It's pretty firm and comfortable and the new smell goes quickly. I'd definitely buy another of I needed another mattress. The only downfall in buying from Wayfair is the delivery company (DHL) unfortunately, delivered our mattress to a completely different location but marked it as delivered with my name as recipient still.. Kane. Hampshire. Tue Nov 11 2025

Kingsize (5')

This dual comfort all-foam mattress has been carefully designed with a layer of high-quality next-generation visco-elastic memory foam for the top comfort layer, the foam molds and shapes to your body provide luscious comfort and support. The mattress features a thick layer of firmer orthopedic reflex foam giving the mattress a medium firm feel with a total depth of approximately 22cm. Designed to support you in all the right places, this mattress gives you extra care for your back, shoulders, and hips. The firmer orthopedic reflex foam provides all the support you need for a restful and relaxing night’s sleep. The new innovative reflex foam is made up of thousands of bubbles that spread apart when the sleeper lies on it, giving you a bounce back. With both reflex foam and memory foam, you will have the experience of medium firm comfort.

Very nice mattress so comfortable and a good price. Diane. London, GB. Thu Apr 02 2026

Kingsize (5')

This all-foam mattress has a deep dual layer of a memory foam mattress. With a combination of 6" an inch (Approximately 15cm) support base with high-density Reflex Foam with a 2" inch (5cm approximately) top layer of super-soft Memory Foam. Both foams work together to provide the sleeper with a medium firm comfort. The open-cell Memory Foam molds to your body providing exceptional comfort, pressure relief, and the perfect weight distribution for a relaxing night’s sleep. The open cell Reflex Foam provides firm support helping the body, neck, hips & shoulders. The mattress has been designed with a white zip cool touch removable cover.

Very comfortable. Chandrika. Bradford, GB. Tue Mar 15 2022