23Zero Armadillo Horizon 3 Annex Extension Add extra ground reach to your Horizon 3 annex when your rooftop tent sits higher than standard. The 23Zero Armadillo Horizon 3 Annex Extension is a simple add-on designed to help your Horizon 3 annex reach the ground more effectively on taller vehicle setups. Built as a double-zippered fabric insert, this extension installs between the annex walls and the annex floor to add approximately 4 inches of additional height while helping maintain a more complete enclosed space. This added height is especially useful for lifted vehicles, uneven campsites, or rack setups where the annex floor does not fully meet the ground. Installation is straightforward: unzip the annex floor, align the extension between the existing zipper tracks, and zip the walls and floor back into place. What's Included 4-inch Horizon 3 annex extension Storage bag Key Features 4-Inch Height Extension: Adds approximately 4 inches of additional annex height to improve ground reach. Designed for Horizon 3 Annex Fitment: Sized specifically for the Armadillo Horizon 3 annex system. Double-Zipper Installation: Zips between the annex walls and floor using the existing zipper tracks. Improved Enclosure Coverage: Helps reduce gaps caused by lifted vehicles, taller rack systems, or uneven terrain. Maintains Privacy and Weather Protection: Extends the annex while helping preserve the enclosed feel of the original setup. Easy Storage: Packs into the included storage bag for transport and organization. Specifications Compatibility: 23Zero Armadillo Horizon 3 annex system Height Increase: Approximately 4 inches Attachment Style: Double-zipper connection Storage Dimensions: 11" W x 6" L x 4" H Size Tag: L for Horizon 3 Annex Setup and Storage Unzip the annex floor from the annex walls. Align the extension zippers between the floor and walls. Zip the extension into place using the existing zipper tracks. Fully reattach the floor and walls before use. Store the extension in the included bag when not in use. Important Fitment Notes Select the extension size that matches your Horizon annex model. This Horizon 3 version is designed for the Armadillo Horizon 3 annex system. The extension is intended to install between the annex walls and the annex floor. Ideal for setups where the annex does not fully reach the ground. Watch your step: adding 4 inches of annex height may also raise the entrance height.