What kit do I need to return when I leave?


I joined an URNU but discovered that it just wasn't for me, and I decided to leave. I was wondering exactly what uniform and kit I need to return - obviously I need to return my uniform, I'm not disputing that at all - but my coxswain has insisted that I return even my socks ( which after six months of use are a bit disgusting) and I get the sense he is being officious and trying to make my life difficult. My friend who was in the army said you don't need to return close contact kit ( such as socks, t-shirts and boots) when you leave the army, is there a similar official policy in the Navy? It seems a bit much to me. Could someone advise me? I would be very grateful. Thank you!