The DF is the first bicycle of a new generation of velomobiles. The practical usability of the Mango and the Quest made at Velomobiel.nl have been combined by designer Daniel Fenn with experiences in super light and stiff construction that he had gained with the Go-one Evo Series. The result has proven to be very successful, together with the later built XL version for larger people, more than 700 copies have been made since 2013! The model has been fine-tuned over the years and with a somewhat larger update at the beginning of 2023, it is still competitive.