Clo - Clothing and Thermal Insulation
Clo is used to measure the thermal insulation of clothes
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The insulation of clothes are often measured with the unit "Clo", where
1 Clo = 0.155 m2K/W
- Zero (0) Clo corresponds to a naked person
- One (1) Clo corresponds to a person wearing a typical business suit
| Clothing | Insulation | ||
| Clo | m2K/W | ||
| 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 overjackets and overtrousers | 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 the person, adding them together. The mean surface area of the human body is approximately 1.7 m2.
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