Merino Wool Slip Over Jumper in CayenneBudd's sweaters are made by experts in Scotland, in a workshop that dates back almost 150 years. They use the much prized, ultra soft wool of the iconic Merino sheep, a natural super thin fibre able to regulate temperature and moisture. For a snug fit, we recommend you stick to your regular chest size but try a few sizes larger if you want a little more room.