SRD:Silent Moves

Silent Moves: This armor is well oiled and magically constructed so that it not only makes little sound, but it dampens sound around it. It provides a +5 competence bonus on its wearer’s Move Silently checks. (The armor’s armor check penalty still applies normally.)

Faint illusion; CL 5th; Craft Magic Arms and Armor, silence; Price +3,750 gp.

Silent Moves, Improved: As silent moves, except it grants a +10 competence bonus on Move Silently checks.

Moderate illusion; CL 10th; Craft Magic Arms and Armor, silence; Price +15,000 gp.

Silent Moves, Greater: As silent moves, except it grants a +15 competence bonus on Move Silently checks.

Moderate illusion; CL 15th; Craft Magic Arms and Armor, silence; Price +33,750 gp.