You are here: Factor 1> Factor 1 Long Sleeve Thermal Underwear Base Layer
Thermal underwear base layer long sleeve unisex top is snug fitting with plenty of stretch (100%) which makes it feel as comfortable as a second skin and allows for a close comfortable fit for most body shapes. The stretch, coupled with long cut, will prevent the garment from rucking up under active conditions that may cause discomfort and cold spots on the lower back. The super efficient hydrophilic finish will wick perspiration away, leaving your skin feeling warm and dry
This is an ideal thermal underwear base layer suitable for all outdoor sports such as hiking, rowing, canoeing, running and skiing. For extreme temperatures 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.
Manufactured in UK
No-chafe, flat shoulder seams
Seamless body for extra comfort (flat side seams on XSmall & XXL)