Bed related Bed mattress (Larkowl)

Made from the hair of the Dipterocarpus camel grazing in the South Gobi region of Mongolia. Its raw wool has excellent heat-retaining, moisture-absorbing and moisture-dissipating properties as it adapts to the harsh natural environment, where the summer climate reaches 45°C and the winter temperature drops to 40°C below zero. Camel wool has better moisture release properties than wool and can maintain an ideal humidity level of 40-50% at all times. Sleeping perspiration is absorbed 30% in the duvet and 70% in the mattress, making camel the most suitable bedding material. By placing camel hair on the top layer of the cushion unit, the mattress has both excellent moisture release and warmth without steaming.

Yak is found in the cold highlands and mountainous regions, such as the interior of Mongolia. Yak wool, also known as Tibetan cashmere, is so soft and delicate that it is used as a luxury fabric. Its long, thick hair is also strong enough to be used for ropes and hats. Yak body hair is particularly suitable as a material for bedding due to its durability, heat retention, moisture absorption and wicking properties. The use of natural yak hair in mattresses, a mixture of tough, strong hair and soft, delicate wool, results in a mattress that is both warm, supportive and resistant to sagging. Yak hair, which has thicker fibres than camel, is used under the camel to provide more body support.

In German-speaking countries, horsehair has long been used as a traditional luxury material for sofas, mattresses and cushions for luxury car seats, as the saying goes: 'The nobility use horsehair mattresses, the common people use straw'. Only a small amount of hair can be extracted from a single horse, making it an extremely precious material. It is characterised by its strong, supple, thick and long hair, which is used for violin strings. The luxurious covering of resilient, supportive and durable horsehair provides firm support for the body during sleep. It also has excellent ventilation properties, including the ability to regulate humidity and temperature.

Cashmere is highly prized because it can only be obtained from cashmere goats that live in the natural environment of cold and hot mountainous regions, where only 150-200 g of cashmere can be extracted from each goat. Cashmere wool has a smooth, velvety sheen and a unique wet look, and is outstanding in terms of softness, texture, lightness and warmth. Cashmere wool is also extremely delicate compared to wool, which allows water to penetrate more quickly, making it highly absorbent and less prone to dampness. Iwata uses a method of mixing cashmere wool with camel wool to solve the problem of pilling (hair pilling caused by friction) when cashmere is used in mattresses that are subject to body pressure. This has resulted in a mattress that is softer and better at retaining heat than a mattress made solely from camel, while making the most of the advantages of cashmere.

Larkowl Red

Larkowl White

Comparison of temperature and humidity on the mattress between larkowl and urethane mattresses showed an increase in both temperature conditions, but a significant decrease in humidity in A. (Demonstration 1)

Urethane had a stronger demand for cooler mattresses and more felt stuffy. (Demonstration 2) (iii).

A comparison of the temperature and humidity in the duvet between the Larowll and spring mattresses showed that the temperature increased in A. In addition, humidity was reduced in A. (Demonstration 1)

*Presented at the 67th Congress of the Japanese Society of Physiological Anthropology *Reproduction of this data is prohibited.

Larkowl was found to be warmer on the feet and more comfortable during sleep. (Demonstration 2) (iii).