the OMM Core Tights

the OMM Core Tights

See our entire range from the OMM here!

The OMM Core Tights are ultra-light, insulating running tights for long winter runs, cold mountain adventures and overnight stays. PrimaLoft® ACTIVE 75 g/m² provides warmth with very low weight and pack volume, while the open construction offers very high air permeability.

The tights weigh only about 130 grams in size M and can be used as standalone running tights or as an insulating layer under wind or shell pants.

PrimaLoft® ACTIVE 75 g/m²

PrimaLoft® ACTIVE is made from synthetic insulation fibers woven into an open mesh material. The construction creates insulating air pockets without multiple layers of fabric, providing warmth with less weight and pack volume than traditional fleece.

The material continues to insulate when it gets damp and effectively wicks away sweat, making Core Tights particularly useful during long activities where intensity, temperature and weather can vary.

Customizable insulation for winter running

When worn without outer pants, the Core Tights allow air to move through the open material and transport away excess heat, helping to reduce the risk of overheating during runs and steep climbs.

Under wind or shell pants, the insulating air is retained and the tights become significantly warmer. The combination acts as a lightweight and flexible system for cold, windy or snowy conditions.

Core Tights are not waterproof and provide limited wind protection over most of the garment. In case of precipitation or strong winds, they should be combined with suitable outer trousers.

Flexile panels above the knees

The knees are reinforced with panels of stretchy Flexile nylon. The panels provide extra durability and improved wind and water resistance over an area that is often exposed to weather, terrain contact and repeated movement.

The flatlock seams are positioned away from areas where friction is likely to occur. The wide elastic waistband fits comfortably and provides low bulk when worn with multiple layers.

Benefits

Ultralight insulating running tights

PrimaLoft® ACTIVE 75 g/m²

Weighs approximately 130 grams in size M

Adapted for long winter shifts and cold overnight stays

Very high air permeability

Efficient moisture transport

Continues to insulate when the material is damp

Very small packing volume

Flexile panels in stretchy nylon above the knees

Improved wind and water resistance above the knees

Wide elastic waistband

Flatlock seams placed away from chafing areas

Reflective logo

58% post-consumer recycled material

Can be worn alone or under wind and shell pants

Suitable for trail running, winter running, fastpacking and outdoor activities

Use as running tights or insulation layer

When running in dry, cold weather, the Core Tights can be used as an outer layer. The open PrimaLoft® ACTIVE construction then provides a combination of insulation and very high ventilation.

In cold wind, precipitation or low activity levels, the tights work best under a windproof or waterproof outer layer. They can also be used as a light insulating garment during overnight stays and rest in camp.

Fit and size

The OMM Core Tights feature a unisex Contact Fit and are designed to sit close to the body for efficient moisture transport and low bulk under outerwear. The leg length may feel slightly shorter than traditional training and hiking pants, as OMM designs its running garments to keep the material away from your feet.

For a technical fit, choose your usual size. As the model is unisex, women who usually wear OMM women's sizes may in some cases prefer a size smaller.

Specifications

Model: Unisex

Type: Insulating running tights

Area of use: Winter running, trail running, fastpacking and overnight stays

Main material: PrimaLoft® ACTIVE

Material weight: 75 g/m²

Reinforcements: Flexible stretch nylon over the knees

Weight: Approximately 130 g in size M

Fit: Contact Fit

Waist: Wide elastic waistband

Seams: Flatlock seams placed away from chafing areas

Detail: Reflective logo

Recycled content: 58% post-consumer recycled material

Material standards: bluesign® and OEKO-TEX® approved

Waterproof: Not waterproof

Wind and water resistance: Reinforced Flexile panels above the knees

Care instructions

Always follow the washing instructions on the garment label. Turn the tights inside out before washing and avoid washing them with garments or equipment that have Velcro fasteners, as these can damage the open PrimaLoft® ACTIVE material. Do not use fabric softener.

The OMM Core Tights are ultra-lightweight, insulating unisex tights with a very close-fitting Contact Fit. Choose your size primarily based on your waist circumference and use your body length and inseam as supplementary measurements.

Size chart

The table shows body measurements. The inseam length is a guide and helps you assess how far down the leg the tights will sit.

How are the OMM Core Tights sized?

Core Tights feature OMM's most body-hugging fit, Contact Fit. They are designed to sit close to the legs to reduce excess material and work seamlessly under wind or shell pants.

The fit can feel tighter and less elastic than traditional running tights with a high proportion of Lycra. The tights should follow the body, but they should not restrict your stride or pull down the waistband when you lift your knees.

OMM running garments often have slightly shorter legs than regular hiking and leisure pants. This is intentional to keep the material away from shoes and feet while running.

Our size recommendation

• Choose primarily according to your waist circumference.
• If you are in the middle of a range, you can normally choose the corresponding size.
• If you are on the upper limit or between two sizes, we recommend the larger one.
• Choose the larger size if you have thicker thighs or want a slightly less tight feel.
• Don't go down a size to get compression – Core Tights are body-hugging but not intended as compression tights.
• Since the model is unisex, both women and men should use the body measurements in the table and not their usual clothing size.

How do you measure?

Waist circumference

Measure around your natural waist, usually where your torso is at its narrowest. Stand relaxed and hold the tape measure horizontally without pulling it tight.

Inseam length

Measure from the crotch along the inside of the leg down to the ankle. You can also measure the inseam of a pair of tights or pants that fit well.

Body length

Measure your height without shoes. Use the height as a complement to the waist measurement, as leg and torso proportions vary between people.

Check the fit

Try the tights on with your regular base layer or underwear. Do some deep squats, high knee lifts, and running strides.

The right size means that:

• The waistband sits securely without cutting in or rolling.
• The tights lie close to the body without large folds.
• the branch sits in place without hanging
• the knee panels end above the knees
• you can take the running step without resistance
• the waistband does not pull down when you lift your legs
• the seams do not create pressure or chafing
• The tights work under a pair of wind or shell pants without excess volume

If the waistband cuts in, the fabric is too tight across the thighs or seat, or your freedom of movement is restricted, you should choose a larger size. If the crotch hangs and the material bunches behind the knees, a smaller size may provide better function.