This is an Arc'teryx Alpha SV jacket. I purchased it at an authorized retailer in Omotesando. ARC'TERYX Arc'teryx Alpha SV alpha ■Model: Alpha SV ■Size: S ■Material: GORE-TEX PRO No claims, no returns, and no cancellations. Rest assured, this is authentic. I've heard that there are many counterfeit Arc'teryx items on flea market sites. There are reports of sellers using images as if they own the item, and then sending a different jacket after the sale, so please be careful.