How do I make players spawn with Accesories?

Check when a player joined, and clone the model to their character. Do something like this:

game.Players.PlayerAdded:Connect(function(plr)
	plr.CharacterAdded:Connect(function(char)
		local Accesory = --put the accesory here, I recommend having it on ServerStorage and 				 
                                            cloning it from there
		Accesory.Parent = char
	end)
end)

This functions check when a player joined, and after when a character spawned (Works for respawn) And it clones the accesory into the character.

This haves to be a Server Script inside of ServerScriptService ; And put the accesory inside of server storage. In the local variable, do this: local Accesory = game:GetService("ServerStorage").AccesoryName

Hope I helped. If it works accept my answer please ;)