The OTTY PURE Hybrid Bamboo & Charcoal Mattress

Otty Pure Bamboo and Charcoal Mattress Layers:

It should be noted that all the polyurethane foams contained within the Otty mattress are CertiPUR and Europur certified. CertiPur lays down strict criteria on what can be used within the foam and the levels of those chemicals. This helps minimise VOCs (volatile organic compounds).

Otty Pure Cover:

As is so often the case the cover is a white top with dark grey sides but adds some colour with two blue stripes around the top edge. The edges have a light grey section running all the way round which is meshed and will allow for some increased airflow. Unfortunately there are no handles and the cover is removed by a zip which is right under the bottom of the mattress. However it is not machine washable and must be spot cleaned or wiped with a damp cloth. The cover is decent quality at 500gsm.

One big deal about this cover over the Otty Original is that it contains its own layer of memory foam, 2 cm of memory foam making it essentially the top comfort layer. This helps make it feel softer than the original. The other big deal is that it is made with Bamboo fibre. When bamboo is part of a fabric it means the bamboo has been dissolved and made into a useable fibre which has then been woven into the fabric. Bamboo fibre is both soft and flexible while also being naturally strong. Bamboo is also said to be hypoallergenic and antimicrobial. However there is some controversy over it’s antimicrobial properties which is partly related to how much bamboo kun remains after the process of making into a usable fibre. Another reason for its use in in bedding is that Bamboo fibre has been shown to reduce heat retention and thus provide a cooler sleeping surface. Bamboo is actually temperature regulating helping to keep you cool on warmer nights and warmer on cool nights. Bamboo fibre is highly wicking and breathable material, absorbing your moisture and then allowing it to evaporate. Essentially a semi-man made fiber often also called rayon from bamboo.

Top Layer:

Memory foam is a slow responding material made from polyurethane foam but with additives that give it a unique feel. Unlike normal polyurethane foam or latex foam memory foam has little to no push-back. Unlike polyfoam that compresses under you memory foam dissipates around you which give it its great molding and body hugging properties. As memory foam works by absorbing your body heat some people find memory foam sleeps too hot.

The otty memory foam comfort layer has two features to help reduce heat issues. The use of bamboo and charcoal in the memory foam helps with temperature regulation. Charcoal is a lightweight black carbon residue produced by strong heat and most often derived from wood but not always. Indeed most often Bamboo is the original source for the charcoal when a memory foam is infused with bamboo charcoal. However Otty insist this is not the case with the Otty Pure Hybrid and that the bamboo and charcoal infused within the memory foam are seperate constituents. The properties of bamboo have been laid out in the above section on the cover. Charcoal has the benefits of being able to absorb some of the chemicals and VOCs from the foam along with any odours. It’s is also said to help with heat regulation. The memory foam also features holes across its surface known as pincore holes. This will aid with airflow from through the mattress and help again with any heat issues from the memory foam itself.

Second Layer:

Effectively the third comfort layer. This polyfoam layer will help add some responsiveness to the memory foam layer above being more springy than memory foam. This layer also provides additional comfort before your hit the body supporting pocket springs below.

Third Layer:

Up to 2000 pocket springs which means in a king size. Other sizes will have proportionally more or proportionally less.

The original Otty hybrid had 14 cm pocket springs while the latest generation has 16cm pocket springs. Potentially this could mean more contouring deep down. Also if all parameters are kept the same as in gauge, spring rate etc then taller pocket springs will feel a little softer. Pocket springs have an advantage over foam in they have a lot of side to side movement as well up and down movement. This however means they often not great on the edges because they can have a roll off effect. For this reason unless the pocket springs are actually designed to be used along the edges foam is used to add edge support. This is known as boxing in or encapsulated pocket springs. Otty has 15 cm of boxing in around the ends and sides of the mattress. The foam around the edges has holes through it to provide increased air circulation.

Pocket springs differ from open coil in that they are all individual pocket springs and not one long coil as in older open coil mattresses.

Fourth Layer:

A base layer of foam to provide a stable base for the pocket springs above.

Otty Hybrid Mattress Overall:

Total height 28 cm (11 inches)
Average density: 44 kg/m3