Why can't others see the clothing change?

I've made a GUI and tested to see if the clothing is changed. This works and I see the change, yet my friend told me that he cannot see my clothing change when I can. Is this only changing for a Client not the Server? My Filtering Enable is off. If it's needed, here's the LocalScript (This is a LocalScript, maybe that's why?) :

Plr = game:GetService("Players").LocalPlayer
UniTop = "rbxassetid://227007415"
UniBottom = "rbxassetid://227007712"


script.Parent.MouseButton1Click:connect(function()
print("Clicked")
	if Plr.Character:FindFirstChild("Shirt") then
		Plr.Character.Shirt.ShirtTemplate = UniTop
		print("Shirt Found and Changed")
		script.Parent.Parent:Destroy()
	else
		print("No Shirt, Adding Now")
		local S = Instance.new("Shirt", Plr.Character)
		S.ShirtTemplate = UniTop
		script.Parent.Parent:Destroy()
	end
	if Plr.Character:FindFirstChild("Pants") then
		Plr.Character.Pants.PantsTemplate = UniBottom
		print("Pants Found and Changed")
	else
		print("No Pants, Adding Now")
		local P = Instance.new("Pants",Plr.Character)
		P.PantsTemplate = UniBottom
	end
end)

Because it's a local script. LOCAL script.