I'm trying to make myself completely invisible. So far I've managed to achieve 96% by equipping Dragon Legs to my chest, arms, and legs. The head was the only part that was still visible, so I tried using No Travel Gear(head piece) + Ring of Fog. The results were somewhat acceptable, but not 100% like I've seen from other modders at Dark Anor Londo.

It'll be great if someone knows the decimal value for just the head piece of No Travel Gear.