How to Dress for Cold Weather

On days when the air is cold, the wind is blowing, and the humidity is high or it’s raining, your clothing strategy is key to keeping you from getting a cold stress injury. Here are some tips for how to dress when the temperatures drop.

Layering lets you adjust your body’s temperature by putting on and removing items of clothing and maintaining an even comfort level as conditions or your exertion levels change. To dress for cold weather, you need three layers for maximum warmth and protection.

• Base layer: Your long underwear needs to keep your skin as dry as possible.

• Middle layer: Your fleece or puffy jacket needs to preserve as much body heat as possible.

• Outer layer: Your rain gear needs to protect you from rain and wind.

 Choosing your base/underwear layer

Warm skin starts with dry skin, so long underwear’s job is to wick perspiration away from you. Synthetic fabrics like polyesters are great at both wicking and drying. Wool is a good natural fiber option that holds its insulating abilities even when wet. Avoid cotton fabrics, as they do not retain their insulating abilities when they get wet.

Think about the fit. Wicking cannot occur in places where fabric is not touching skin, so you want a comfortably snug (not tight) fit everywhere.

Thickness or weight: Heavyweight makes sense for sub-freezing temps and low activity levels. Midweight is a good all-around choice. Lightweight is left to milder conditions.

Choosing your middle/insulating layer

This is the layer most people think about in cold conditions, so it’s not surprising that this layer’s job is to retain warmth.  Insulating materials like fleece are a good start. Make sure your jacket is a heavyweight fleece. When you are working outdoors in serious cold weather conditions, then a puffy jacket/coat should come into play. Down coats and jackets are a good standard if you are not working in wet conditions. They lose their insulating ability when they get wet. Puffy jackets/coats with synthetic fills are a better option when conditions get damp.

Insulating thickness can be tricky because you can’t rely on thickness to indicate warmth level when insulation types differ. Temperature ratings on labels are not reliable because there are too many variables (wind, rain, activity level, etc.) You can eyeball 2 jackets with identical insulation specs though and conclude that puffier equals warmer.

Full coverage: Don’t just think about jackets/coats - save some love for the legs. Keep some insulated or fleece pants with you, so your lower half can stay as warm as your top half.

Choosing your outer layer (shell coat and pants)

This is our outer line of defense. Even though it’s often referred to as “rainwear”, this layer’s job is to shield the underneath layers from snow, sleet, rain, and wind. There are 3 important attributes to consider when choosing your outer layer.

•  Precipitation protection: A wicking base layer can’t keep your skin dry if moisture is soaking you from the outside. In winter you don’t want to sacrifice any warmth to evaporation cooling. Wear a shell that is “waterproof” rather than merely “water resistant”.

• Breathable protection: Perspiration wicked by your base layer needs a way to escape. Wear a shell that is breathable, or moisture can build up inside it and soak you. You don’t need the most expensive GORE-TEX rainwear – any shell that is designated as “waterproof/breathable” should work fine.

• Windchill protection: The good news is that any shell that is “waterproof” is also “windproof”.

Shell pants- Cold, wet ankles are no fun, so be sure your boot tops are covered. If your pants don’t cover your ankles, then consider wearing a pair of gaiters.

Keeping Your Head, Hands, and Feet Warm

To prevent extremities from getting cold, cover up everywhere. The warmest options in hats, gloves, and footwear do the same thing as layers elsewhere: wick, insulate, and block rain/wind.

Hats- Wool or synthetic beanies work well, and you can rely on your shell jacket/coat’s hood for rain coverage. Full-on winter hats will have insulation inside the shell material. Make sure your headwear covers your ears. If your face is uncomfortably cold, wear a balaclava.

Gloves- Fleece gloves provide basic warmth. Insulated gloves, especially ones with waterproof/breathable shells are better. Mittens are warmer than gloves, because they share finger warmth.

Boots- with thick non-cotton socks can provide warmth when conditions are merely cold, but not wet or snowy. Waterproof boots are the next step up. Winter boots, in addition to offering traction on snow and ice, will also include insulation.

A Warmer Coat- Think of this as a twist on “cold hands, warm heart”. If your heart is warm and toasty, then it has plenty of warm blood to pump out to the hands and feet. Choose a well-insulated waterproof winter coat.

Chemical Warming Packets- Add warmth by slipping hand and foot warmers inside your gloves and socks. They come in a variety of sizes.

Additional Layering Tips for Cold Weather

Don’t wait to adjust layers: Throw on a shell at the first sign of rain or wind and remove your insulating jacket the minute you start to sweat. Staying warm and dry is easier than warming up or drying out.

Cotton is a no-no in any layer: Set aside your love of cotton flannel (or anything cotton) because it soaks up moisture and takes forever to dry out. That is a recipe for hypothermia.

Layers should play well together: Middle and outer layers need to glide on and off. When they fit too tightly over the layers beneath them, adjustments become cumbersome and you risk constricting circulation. Purchase middle and outer layers that are big enough to provide another layer (that of air) between them. This layer of air stays warm and keeps you warmer.

Taking time to make some smart decisions about your winter clothing will keep your warm and toasty and safer this winter.

Protecting Yourself from Cold Stress Illness

Workers who are exposed to extreme cold or work in cold environments may be at risk of Cold Stress. Extremely cold or wet weather is a dangerous situation that can cause occupational illness and injuries such as hypothermia, frostbite, and trench foot.

Trench Foot

Any injury to the feet resulting from prolonged exposure to wet and cold conditions that can occur at temperatures from 60 degrees or below, when the feet are constantly wet due to sweat or immersion in water.

Symptoms: Reddening of the skin, numbness, leg cramps, swelling, tingling pain, blisters and ulcers, bleeding under the skin, gangrene (foot turning grey, dark purple, or blue).

First Aid: Remove shoes/boots and wet socks; Dry feet thoroughly; Avoid walking on feet (may cause tissue damage) for 3-10 days as per doctor’s recommendations.

Frostbite

Any injury to the body that is caused by freezing, which most often affects the nose, cheeks, chin, ears, fingers, and toes.

Symptoms: Reduced blood flow to extremities (mentioned above), numbness, aching, tingling/stinging pain, bluish or pale waxy skin.

First Aid: Get into a warm area out of the weather ASAP; Unless necessary do not walk on frostbitten feet/toes; Immerse the affected area in warm (not hot) water, or warm the affected area with body heat. Do not use radiating heat from hot pad, furnace, electric heater, or fireplace for warming; Do not rub or massage the frostbitten area (may cause tissue damage).

Hypothermia

A condition in which the body uses up its stored energy and can no longer produce heat. Often occurs after prolonged exposure to cold temperatures.

Early Symptoms: Shivering, fatigue, loss of coordination, confusion/disorientation.

Late Symptoms: No shivering, blue skin, dilated pupils, slow pulse and breathing, loss of consciousness.

First Aid: Seek immediate medical attention; Move victim into a warm room/shelter; Remove wet restrictive clothing; Warm the center of the body first (chest, neck, head, groin) using blankets or skin to skin contact under loose dry layers of blankets, towels, clothing; If the victim is conscious and lucid give them warm (not hot) non-alcoholic drinks; Once body temperature has increased, keep them dry and warm in blankets including head and neck; If no pulse, begin CPR.

Preventative Protection

Watch or listen to weather forecasts and prepare for the day:

• Monitor your physical condition and that of your co-workers

• Wear appropriate clothing for the conditions (Keep warm and dry)

• Be aware that some clothing may restrict movement putting you at greater risk due to loss of circulation; Wear loose fitting layered clothing

• Protect ears, face, hands, and feet in extremely cold, wet, windy conditions

• Take breaks in warm locations (but not overheated); Limit the amount of time outside

• Carry extra socks, gloves, hats, jacket, blankets, and a thermos of warm liquid

• Include chemical hot packs in your first-aid kit

• Avoid touching cold hard objects with bare skin

Trenching and Excavation Safety: Planning is Paramount

In an instant and without notice, an unsupported trench can give way and a worker can be buried alive. “Even though small amounts of dirt may not seem treacherous, a single cubic yard of dirt can weigh more than 3,000 pounds, which can fatally crush or suffocate workers,” NIOSH states. OSHA notes that excavation and trenching are among the most hazardous construction operations, with cave-ins being perhaps the most feared trenching hazard. Other hazards in this line of operation include: falls, hazardous atmospheres, and falling loads.

How can employers help keep workers safe? NIOSH recommends that employers do the following before beginning a trenching or excavation project:

·       Designate a trained “competent person” to check that all safety precautions are in place. In relation to trenching, OSHA defines a competent person as “an individual who is capable of identifying existing and predictable hazards or working conditions that are hazardous, unsanitary, or dangerous to workers, soil types and protective systems required, and who is authorized to take prompt corrective measures to eliminate these hazards and conditions.”

·       Call 8-1-1 to ensure no utility lines are in the job area and to mark any existing lines.

·       Locate safe places away from the trench to place spoil piles and heavy equipment paths.

·       Ask the competent person to determine what kinds of protective systems will be needed for the job and have the systems in place before workers are allowed in the trench or excavation.

·       Enforce the rule that workers who are younger than 18 are not allowed in the trench or excavation.

·       Assign workers to the job only if they have been trained about hazards and work practices in a language and at a literacy level they understand.

·       Have a written emergency action plan in place that details the steps to take in the event of a trench incident and do hands-on training of that emergency action plan.

·       Make sure all workers know to never enter an unprotected trench.

·       Teach workers to immediately exit a trench and call for the competent person if they find any evidence of problems with the protective system.