I wore this to a concert, and it's perfectly suitable for a neat and tidy look! #GU #Uniqlo #Kids #Children #Performance #Event #Ceremony #FormalOccasions #MUJI #Suit #EntranceCeremony #Graduation #Junior #Recital #Slacks #ElasticWaist Pants → Black. Thickness ⇒ I think it's normal for indoor use. It would probably be cold outdoors in winter. I think it's relatively clean, but it's a used item, so please understand before purchasing.