The Shearwater Perdix Protective Case is a silicone cover designed specifically for the Perdix, Perdix AI, and Perdix 2 dive computers, fitting each model's exact dimensions rather than a generic sizing. It covers all sides of the computer, guarding against scratches, bumps, and general wear that accumulate through regular boat and shore diving. The silicone material is lightweight and flexible, allowing it to stretch into place without tools and stay seated through normal handling.

Cut-outs in the case align with the display and both piezo touch buttons, so screen visibility and button operation are unaffected once the case is fitted. The case does not add meaningful bulk or weight to the computer, and it can be removed for cleaning or drying without difficulty. It's available in black and white. This case is a fit accessory only; it does not include a screen protector, and divers who want additional lens protection should look at Shearwater's separate screen protector for the Perdix range. It's compatible only with Perdix, Perdix AI, and Perdix 2, and not with the Petrel, Peregrine, Teric, or NERD lines, which use differently shaped housings.