It is bordered by the Zürichsee to the west, by the locality of Pfäffikon to the south and by the Hurden canal to the north; to its east the Obersee (upper Lake Zurich) at Rapperswil is situated, as well as the Holzbrücke Rapperswil-Hurden being another protected area.

[2] Strong recovery pressure, nutrient input, excavated material from drainage ditches and (especially in this deep geographical location) the propagation of rampant foreign plants endanger the sensitive area.

In recent decades, commercial and residential buildings, intensified agriculture and leisure claims have gradually reduced the area, a remnant of nature in the laundry room: this is the charm and the great danger.

[2] In addition to the safeguarding of sites by own land acquisitions and the completion of contracts, the broad-based Frauenwinkel foundation, supported by the environmental organizations Ala, SKV, WWF, ZSL and Pro Natura Schwyz, the municipality Freienbach, farmers and industry forces the protection and enhancement of the area by public relation works.

The area is a moorland and fen site of national importance, according to the Cantonal Protection Ordinance (German: Moorlandschaft und Flachmoorobjekte von nationaler Bedeutung, Kantonale Schutzverordnung).