A snug & streamlined full head cover with a wind resistant front panel to keep you cozy in the thick of winter. Precisely tailored to fit under a helmet the Barrier Skull CapÂs mildly scalloped back prevents fabric bunching while in the cycling position. P.R.O. Thermal Dry fabric provides ultra quick-drying warmth reflective elements enhance safety & an otherwise hidden rear port opens as needed to accommodate a ponytail PRO Barrier fabric panel on forehead provide lightweight wind protection & water resistance PRO Thermal Dry fabric provides optimal moisture transfer dry time & odor absorption with warmth Ergonomic cut layers easily under helmet Low profile ponytail port allows for long hair & does not interfere with helmet retention mechanisms Reflective elements for low light visibility One size fits all Weather forecast: Cold & windy Temperature range: -5 to 5 degrees Fabrics: Barrier Front Panel of 100% polyester & Thermal body of 90% polyester 10% elastane