SLS3 Running Beanie | Skull Cap | Helmet Liner | Cycling Cap | Moisture Wicking | Thermal Fleece | Skull Cap | One Size MICRO FLEECE: Fleece is warm like wool and similar in appearance, but it is much softer, lighter, and easier to wash. MOISTURE TRANSPORT: Moisture Transport System wicks sweat away from the body, keeping you nice and warm. ULTIMATE COMFORT: flatlock seams for a perfect fit and durability. Fits like a second skin! MULTI USE: Makes a Neckgaiter or beanie with drawstring closure / Adjustable drawstring and toggle on/off, can also be fully tighten and used as beanie hat. ONE SIZE: fits most. PLEASE NOTE: it will be tight at the beginning due to the special fabric. The fabric however will stretch and it will be more comfortable after a couple of uses.