Keller Jumpsuit - BlackMeet The Keller Jumpsuit in Black, your new go to style for any occasion. This zip front jumpsuit is inspired by our best selling Keller Pant and features the same wide leg fit with pintuck detailing as the original, with a new addition: a sleeveless bodice. Fastening down the centre with a gunmetal zip, it offers an adjustable neckline with a stand collar for a sleek finish. Each jumpsuit is handmade in Europe from the softest sustainable material.