Helly Hansen HH Baselayer Warm Flow High Neck Half Zip Top - XX Large - Black Lifa Flow - For super quick drying next to skin, Lifa Flow quickly moves away moisture to keep you dry and comfortable. HHWarm with Merino Wool - Inner Lifa fibres to keep you dry, and soft merino wool on the outside to keep you even warmer. 360 Degree Reflectivity - Increases the visibility of the wearer in low level lighting conditions. YKK Chest zip with Autolock - Secures the lock in place when no in use. Flatlock Stitching - Eliminates Skin irritation and potential chafing.