The long sleeve 100% Merino BaseJumper is a genuine do-it-all star of your wardrobe. Superfine Merino is the absolute best against your skin and will be the base garment of choice no matter what you are doing. Cut like a slim fit T shirt with long sleeves, the BaseJumper has generous length making it ideal for outdoor activities (like, say, bike riding) where you want to keep your back covered, and is also very styley with your jeans as a general purpose T shirt that will perform like a champ. The new BaseJumper has a small zip pocket in the side seam at the lower right, just right for a card or a couple of notes. May shrink 3 - 4 %, machine washable but best not tumble dry.