The BMW Under-helmet Beanie Hat Ride 37.5 is a cap intended for hot to very hot weather.Equipped with 37.5 technology, the helmet wicks away all sweat in order to avoid in particular a moist microclimate but also the overflow of sweat from your helmet pads.The active particles do not leave the beanie, do not wash out and do not degrade, even after washing, thanks to the special weaving. The fabric is of course suitable for all skin types, it is hypoallergenic.The material is very breathable and allows you to stay dry in summer, even in very hot temperatures.Size M is recommended for helmets from XXS to M, size L is recommended for helmets from size L to 3XL. BMW Under-helmet Beanie Hat Ride 37.5 | BMW Motorrad