The Royal Navy Personal Clothing System (RNPCS) was adopted navy-wide during 2015 after being tested beginning in 2012. It is similar to the British Army's Personal Clothing System Combat Uniform (PCSCU), but in navy blue instead of multi-terrain pattern. It is divided into two categories: Number 4 dress, which consists of a navy blue fire-retardant jacket (worn tucked in and with the sleeves rolled up or down as personal preference), navy blue beret, navy blue stable belt, navy blue fire-retardant trousers, steaming boots, navy blue T-shirt and an optional navy blue microfleece, and Number 4R dress, which is the same only without the jacket and with an optional baseball cap, to be worn at sea. The peaked cap or sailor's cap may be worn with this dress on certain semi-ceremonial occasions.