Is Healer's Headdress legal in Standard, Modern, and Commander?

Healer's Headdress is legal in: Modern, Legacy, Vintage, Commander, Pauper.

What type of card is Healer's Headdress?

Healer's Headdress is an Artifact — Equipment. Its oracle text reads: "Equipped creature gets +0/+2 and has "{T}: Prevent the next 1 damage that would be dealt to any target this turn." {W}{W}: Attach this Equipment to target creature you control. Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)"