Clo - Clothing and Thermal Insulation
Clo is used as a measure of clothes thermal insulation.
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The insulation effect of clothes can be measured in the unit "Icl, Clo" - where
1 Clo = 0.155 m2K/W
- Clo = 0 - corresponds to a naked person
- Clo = 1 - corresponds to the insulating value of clothing needed to maintain a person in comfort sitting at rest in a room at 21 ℃ (70 ℉) with air movement of 0.1 m/s and humidity less than 50% - typically a person wearing a business suit
| Clothing | Insulation | ||
|---|---|---|---|
| Icl, Clo | m2K/W | ||
| Nude | 0 | 0 | |
| Underwear - pants | Pantyhose | 0.02 | 0.003 |
| Panties | 0.03 | 0.005 | |
| Briefs | 0.04 | 0.006 | |
| Pants 1/2 long legs made of wool | 0.06 | 0.009 | |
| Pants long legs | 0.1 | 0.016 | |
| Underwear - shirts | Bra | 0.01 | 0.002 |
| Shirt sleeveless | 0.06 | 0.009 | |
| T-shirt | 0.09 | 0.014 | |
| Shirt with long sleeves | 0.12 | 0.019 | |
| Half-slip in nylon | 0.14 | 0.022 | |
| Shirts | Tube top | 0.06 | 0.009 |
| Short sleeve | 0.09 | 0.029 | |
| Light blouse with long sleeves | 0.15 | 0.023 | |
| Light shirt with long sleeves | 0.20 | 0.031 | |
| Normal with long sleeves | 0.25 | 0.039 | |
| Flannel shirt with long sleeves | 0.30 | 0.047 | |
| Long sleeves with turtleneck blouse | 0.34 | 0.053 | |
| Trousers | Shorts | 0.06 | 0.009 |
| Walking shorts | 0.11 | 0.017 | |
| Light trousers | 0.20 | 0.031 | |
| Normal trousers | 0.25 | 0.039 | |
| Flannel trousers | 0.28 | 0.043 | |
| Overalls | 0.28 | 0.043 | |
| Coveralls | Daily wear, belted | 0.49 | 0.076 |
| Work | 0.50 | 0.078 | |
| Highly-insulating coveralls | Multi-component with filling | 1.03 | 0.160 |
| Fiber-pelt | 1.13 | 0.175 | |
| Sweaters | Sleeveless vest | 0.12 | 0.019 |
| Thin sweater | 0.20 | 0.031 | |
| Long thin sleeves with turtleneck | 0.26 | 0.040 | |
| Thick sweater | 0.35 | 0.054 | |
| Long thick sleeves with turtleneck | 0.37 | 0.057 | |
| Jacket | Vest | 0.13 | 0.020 |
| Light summer jacket | 0.25 | 0.039 | |
| Smock | 0.30 | 0.047 | |
| Jacket | 0.35 | 0.054 | |
| Coats and over-jackets and over-trousers | Overalls multi-component | 0.52 | 0.081 |
| Down jacket | 0.55 | 0.085 | |
| Coat | 0.60 | 0.093 | |
| Parka | 0.70 | 0.109 | |
| Sundries | Socks | 0.02 | 0.003 |
| Thin soled shoes | 0.02 | 0.003 | |
| Quilted fleece slippers | 0.03 | 0.005 | |
| Thick soled shoes | 0.04 | 0.006 | |
| Thick ankle socks | 0.05 | 0.008 | |
| Boots | 0.05 | 0.008 | |
| Thick long socks | 0.10 | 0.016 | |
| Skirts, dresses | Light skirt 15 cm. above knee | 0.01 | 0.016 |
| Light skirt 15 cm. below knee | 0.18 | 0.028 | |
| Heavy skirt knee-length | 0.25 | 0.039 | |
| Light dress sleeveless | 0.25 | 0.039 | |
| Winter dress long sleeves | 0.40 | 0.062 | |
| Sleepwear | Under shorts | 0.10 | 0.016 |
| Short gown thin strap | 0.15 | 0.023 | |
| Long gown long sleeve | 0.30 | 0.047 | |
| Hospital gown | 0.31 | 0.048 | |
| long pajamas with long sleeve | 0.50 | 0.078 | |
| Body sleep with feet | 0.72 | 0.112 | |
| Robes | Long sleeve, wrap, short | 0.41 | 0.064 |
| Long sleeve, wrap, long | 0.53 | 0.082 | |
An overall insulation - or Clo - value can be calculated by simply taking the Clo value for each individual garment worn by a person and adding them together. The mean surface area of the human body is approximately 1.8 m2.
Example - Clothing Ensemble
| Cloth | Icl |
|---|---|
| Briefs | 0.04 |
| Shoes | 0.02 |
| Socks | 0.03 |
| Short sleeve shirt | 0.19 |
| Straight trousers | 0.15 |
| Total | 0.43 |
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