This incredible vintage Ralph Lauren Polo Expedition Jacket is an XLT and is probably the puffiest jacket I have ever seen. It is double baffled which means it is basically like two jackets sewn together. Each set of baffles has been overfilled with 800 fill Goose Down. Both the exterior  and interior fabrics are a super shiny soft slick nylon. The shell has been coated with a new waterproof/downproof finish which adds to its shininess! The measurements are as follows.
 
Chest : 25”pit to pit
Length: 30”
Sleeve: 33” collar to cuff
Shoulder: 22”