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Factor 1 Long John Thermal Underwear Base Layer Mens Leggings by Sub Zero are snug fitting and have plenty of stretch (100%) which makes them feel as comfortable as a second skin and allow for a close comfortable fit for most body shapes. The stretch, coupled with a high rise back will prevent exposure under active conditions, protecting your kidneys and lower back from discomfort and cold spots. The super efficient hydrophilic finish on these thermals will wick perspiration away, leaving your skin feeling warm and dry.
These are excellent thermal underwear base layer leggings for men where a fly is required. Constructed out of double thickness fabric, the front flap provides extra thermal protection.
These thermal leggings are suitable for all outdoor sports and can be used for anything from running through to rock climbing. For extreme temperature use in conjunction with the Factor 2 range of mid layer thermal underwear.
For a more detailed size chart please visit our technical information pages.
