The D4 is the new paradigm in stormproof, compact, light, and easy-to-deploy portaledges.

Ever since John Middendorf  produced the first expedition D4 portaledge back in early 2017 for Marek Raganowicz, who then used it for an extreme expedition in Baffin Island where he lived in it for 30 nights on two new  big wall routes, the D4 has gotten incredible acclaim, proven with over 1000 nights on the vertical, and widely acknowledged as one of the biggest innovations in big wall gear since the first A5 stormproof portaledge.


Key information on the D4 portaledge and the exciting design process that led to its  development can be found here:

The D4 Portaledge Kickstarter 

D4 Kickstarter Updates (highlighting the open design process)

A5 and D4 Portaledge History 


TO ORDER: The D4 portaledge is currently being produced by Durango Sewing Solutions, in Durango Colorado.  You can order here: