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See our entire range from the OMM here!
The OMM Core Tent Sock is an ultra-lightweight, packable fleece sock designed specifically for use in tents and sleeping systems in cold conditions. Featuring revolutionary PRIMALOFT® ACTIVE insulation, it delivers impressive warmth-to-weight ratio – perfect for mountaineering, fastpacking and expeditions where every gram counts.
The insulation blurs the line between traditional fleece and synthetic padding. Primaloft® ACTIVE loosely weaves insulation fibers through a fine mesh, providing down-like warmth when dry and reliable insulation even when damp . The result is significantly warmer than fleece – at less than half the weight.
The socks are designed for rest and sleep only , not for active use. The minimal seam construction reduces chafing and keeps weight down, while the PointZero nylon ripstop sole provides increased moisture resistance. A silicone logo on the sole provides better grip on tent floors and sleeping pads.
Extremely low weight and minimal packing volume
Keeps feet warm at night in cold conditions
Insulates even when damp
Perfect complement to light sleeping system
PRIMALOFT® ACTIVE insulation (125 g)
4-way stretch for comfort
Nylon sole with PointZero™ reinforcement
Minimal seams
Silicone print for better grip
Insulation: Primaloft® ACTIVE 125 g
Sole: PointZero™ 100, 22 g/m² nylon ripstop
Features: Downproof, very windproof, DWR treated
Use: Only in tent/sleeping bag – not for active use
Never tried OMM before or just need a little help finding the right size? You can find size charts and help finding the right fit HERE!
The OMM Core Socks, officially called Core Tent Sock , are ultralight thermal socks for use in tents and sleeping systems. The size is selected based on your usual shoe size. The socks are not designed as hiking or running socks.
| Size | UK shoe size | Approximate EU size | Size marking |
|---|---|---|---|
| S | UK 3–5 | EU 35–38 | Orange |
| M | UK 6–8 | EU 39–42 | Blue |
| L | UK 8.5–10.5 | EU 42.5–45 | Green |
| XL | UK 11–13 | EU 46–48 | Navy blue |
OMM gives the sizes in UK measurements. The EU conversion is approximate as the conversion can vary slightly between different shoe brands.
Core Socks have an airy and relatively loose fit around the foot. They are designed for warmth and comfort during rest and sleep, not to provide support or a tight performance fit.
The PrimaLoft Active material has four-way stretch, but the opening can feel less elastic when the sock is pulled over the heel. Once the sock is on the foot, the fit is soft and roomy.
An experienced long-distance hiker describes the socks as loose around the foot and without the support you get from a regular hiking sock. The opening is also felt to be somewhat tight when pulled over the heel. Once in place, the socks are described as comfortable and spacious for sleeping.
This suggests choosing the larger size if you are close to a size limit or have a thicker heel and ankle.
Core Socks are specifically designed for:
They are not intended for hiking, running or longer walks. The open insulation is more susceptible to wear and tear than the material in regular activity socks.
The sock should fit the foot without the opening pressing hard around the ankle. The toes should be able to move freely and the insulation should not be stretched too tight.
The fit is too small if the opening is difficult to pull over the heel or if the toes are pressed against the front edge. The sock is too big if it slips off during the night or if a lot of material folds under the foot.
