Lightweight Primaloft ACTIVE stretch fleece sock with second Nylon layer on the sole. Designed to be worn in as a tent slipper and overnight in your sleeping bag.OMM says:Fleece socks utilising the revolutionary PrimaLoft ACTIVE insulating fabric. With minimal pack size and weight, they can be easily stowed until the overnight. Designed to be used in a lightweight sleep system to boost warmth and retain heat at the extremities, not the daily commute.Minimal seam construction keeps weight low and reduces rub points whilst the PointZero sole unit increases moisture resistance and the silicon logo detailing provides grip on the groundsheet. PrimaLoft ACTIVE blurs the line between traditional insulation and fabric.PrimaLoft ACTIVE loosely weaves PrimaLofts industry-leading insulating fibres through a fine polyester mesh. The resultant structure is warmer and less than half the weight of a conventional fleece product Down-like performance when dry whilst also still performing when wet. Designed for use in a tent or sleep system only, not for active use.Our VerdictSuper cosy and incredibly breathable bed socks that are perfect for chilly nights. They pack down incredibly small; I leave mine in the bottom of my sleeping bag with my sleepwear and pillow. Oddly, you can’t pick the colour; the size dictates the colour, so if you have Xlarge feet and don’t like navy blue, you are out of luck, sadly. This a nitpick, but it’s worth pointing out.- Reviewed by Ultralight Outdoor GearPlease note that for hygiene reasons this product is non-returnable unless faulty.FeaturesWarm when wetWind & water resistant Nylon outsole4-way stretchMinimal seamsSpecificationsSmall (UK 3-5) weighs: 36gMedium (UK 6-8) weighs: 39gLarge (UK 8.5-10.5) weighs: 42gXLarge (UK 11-13) weighs: 46gColoursSmall: Grey with Orange trimMedium: Grey with Blue trimLarge: Grey with Green trimXLarge: Grey with Navy trimMaterial & ConstructionPrimaloft ACTIVE 125gPointZero 100% 22gsm nylon ripstop fabric, downproof, highly wind resistant with DWRHelp & advice:OMM Core Technology ExplainedRecycled Content in Outdoor Gear

Lightweight Primaloft ACTIVE stretch fleece sock with second Nylon layer on the sole. Designed to be worn in as a tent slipper and overnight in your sleeping bag.OMM says:Fleece socks utilising the revolutionary