This snug fitting unisex thermal base layer garment has plenty of stretch (100%) which makes it feel as comfortable as a second skin & 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 & cold spots on the lower back. The super efficient hydrophilic finish will wick perspiration away, leaving your skin feeling warm & dry. This is an ideal thermal base layer suitable for all outdoor sports but especially skiing & canoeing where extra neck protection is required but where a zip would be a hindrance. For extreme temperature use in conjunction with the Factor 2 range of mid-layer thermals. For a more detailed size chart please visit our technical information pages.