The cap is made of thin, light and elastic, very comfortable to wear material. It works well finished, sitting in size M with me as well as for my husband, who clearly has the bigger head and for which I would have normally ordered L. Keeps you super warm without being sweaty, his forehead protects even in freezing temperatures reliably against cold wind, and with as without a bicycle helmet useful.
Conclusion: This Bike Cap can not go wrong. Strong buy recommendation.