The Chelsea Royal Baseball Cap. It’s one size fits all, 100% cotton design and features a strap at the back for adjustments.. There is an embroidered Chelsea club crest on the front of the cap with a firm peak. The Chelsea cap is a great gift for any fan and is perfect for wearing to the match, in training or as an everyday item and features a label inside with full washing instructions. The cap is an official product manufactured under licence for the Chelsea football club.