Day 2 of 2-day Oberstdorf hike. From Edmund Probst Haus to Grosser Daumen, Kleinen and Breitenberg. Fairly long sections and scrambly T4 sections. We did it in early June and no via ferrata kit was needed (the section from Grosser Daumen to Kleinen Daumen is marked as type C, but it is just a T3/4 hiking path.)
Finishing the hike at Gruner Hut bus stop, where a connecting bus to Bad Hindelang is available, where another bus will take you to Sonthofen.