Most impressive to me is the soundstage. but probably will not be able to wear without the lining. 5 is euro size 38 which typically equals size 7 to 7. The current sizing as listed on Isotoners website is accurate. Le gustaron a mi esposa Mesh is very breathable, overall shoe is very lightweight. My only complaint is the small lettering in the manual. The only thing that is a problem is the chafing of the buckle. Slipper fit perfectly! The roof rack is sturdy and only added a little wind noise that could be heard through the panoramic roof window.