Our stylish cycling caps are custom-made by Walz. Designed to fit under a helmet, they are also great as a stand-alone. We offer our caps in two sizes, because we've found that 'One size fits all' just isn't true for many of us. SPECIFICATIONS - Cotton/Poly Blend - Hand wash in cold water, hang to dry - S/M: head circumference 21.25" - 23.5" (54 - 60 cm) - L/XL: head circumference- 23.5" - 25" (60 - 63.5 cm) - Made in USA