Product Overview

WTF Hydro Zip-On Back Panel Back Panel 83 for Spiritus Systems' Overt is designed for use with Source Kangaroo, WLPS, and ILPS bladder and CamelBak's 70oz and 100oz short bladders. In addition to the main compartment, there's a loop lined secondary compartment, 4 x 3 PALS on center, two 2 x 3 PALS on either side, and one 2 x 3 PALS on the bottom.

To discourage inadvertent separation from the carrier, zipper pull tabs tuck securely and silently into MIL-W-5664 elastic loops to prevent the slider from riding upward. VELCRO® Brand ONE-WRAP® secures the bladder to the bladder hanger.

Back Panel 83 uses MIL-DTL-32439 500D nylon, A-A-55126 nylon hook & loop, A-A-59826 bonded nylon thread, MIL-W-5683 nylon elastic, A-A-55634 spec heavy duty zippers, and well compensated, skilled labor to produce a cost effective part.

WTF's Back Panel 83 is manufacturable. This design represents a balance of durability, ease of assembly, machine operator fatigue reduction, COTS materials use, cost effective cut and sew methods, self jigging/locating design, scalability, and usability.

Back Panel 83 for Spiritus Overt (size medium) is lightweight at just 8.7oz / 246g. Approx 5 liter volume (approx 4.5 liter main compartment and approx 0.5 liter in secondary compartment). Made in the USA with Berry and NIR compliant nylon fabrics. Bladder not included.

Available in small, medium, large, X large in black, coyote brown, ranger green, wolf grey, Multicam, Multicam Arid, Multicam Tropic, and Mulitcam Black.

Also available for WTF Plate Carrier 24 and Crye JPC 2.0

*all Spiritus Systems trademarks, brands, etc are the sole property of Spiritus Systems. Spiritus Systems do not endorse this product.

introductory price

Reviews

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5
Load carry + hydro = perfect!

Posted by L on 31st Mar 2025

This is my first time ordering from Whiskey Two Four, and I am already thoroughly impressed. Given WTF's methods and materials, I was certain this panel would be well made... but I never thought it would be THIS nice given the price point. The layout, the materials, the construction are all on point. Side by side the stitching and materials are indistinguishable from Spiritus' own. The little tricks like the hook and loop tape to secure the bladder to a D-ring on heavy-duty webbing, the triangular opening for the drinking tube, the laser cut zipper pulls, the elastic zipper fixtures, and the blue colored loop field inside the secondary compartment for contrast. Fantastic piece of kit with world-class workmanship! For anyone curious, this fits the Source ILPS perfectly. A little tight, but it all fits. Seriously, if you're on the fence don't wait. If you need something that WTF makes, just do it. They punch WELL above their price point, and I'd be proud to own anything they make. Thanks WTF!