How to Swap Rex Specs Lenses and Fit Ear Pro Correctly
By K9 Tactical Gear Inc | Published: 2026-11-04
Category: How-to Guides
Step-by-step guide to changing Rex Specs V2 goggle lenses and fitting Rex Specs Ear Pro so your dog stays protected and comfortable in the field.
Quick answer
Swap lenses by removing the frame from the goggle body, seating the new lens evenly, and pressing the frame back until it clicks; fit Ear Pro by measuring head circumference just in front of the ears and choosing the size that sits snug without pinching.
Why lens tint and ear protection are separate decisions
Lens choice depends on light conditions, not on the ear protection. A mirror lens that passes less light helps a light-sensitive dog, while a clearer lens suits low-light work. Ear Pro sizing depends on head circumference, not on the goggle frame size, so treat them as two independent fittings.
If your dog wears both at once, check that the goggle strap and the Ear Pro do not press on the same spot behind the ears. Adjust one, then the other, and recheck both after a few minutes of wear.
When to replace rather than swap
Replace a lens when it is scratched, cloudy, or no longer seats flat in the frame. A lens that pops out repeatedly after reseating is a sign the frame or lens edge is damaged, not a sign you need a different tint.
Ear Pro does not have a replacement schedule in the catalog information; inspect the cups and straps for wear and fit changes instead of assuming a fixed service life.
Step-by-step: lens swap and Ear Pro fit
- Confirm the goggle model: Check that your dog's goggles are the original large Rex Specs V2 before ordering replacement lenses. Look at the frame size and model marking rather than guessing from the tint. If you are unsure of the model, stop and verify before removing the old lens.
- Remove the old lens: Work the frame away from the goggle body at one corner and ease the lens out evenly. Do not pry with a sharp tool, which can tear the frame edge. Keep the old lens flat and clean as a backup for low-light days.
- Seat the new lens: Place the new lens into the frame channel starting at the nose bridge, then work around the rim so the lens sits evenly with no lifted edge. Run a finger around the rim; any soft spot means the lens is not fully seated.
- Reassemble and test: Press the frame back onto the goggle body until it clicks evenly on all sides. Flex the goggle gently and check that the lens does not pop out. If the lens lifts at one corner, reseat it before letting the dog wear the goggles.
- Measure for Ear Pro: Use a soft tape to measure the circumference of the dog's head just in front of the ears. Match that measurement to the three available sizes rather than choosing by breed. Measure twice, especially on dogs with thick or curly coats.
- Fit and check Ear Pro: Slide the Ear Pro into place so the cups cover the ear canal without pressing hard against the base of the ear. Check that the strap sits behind the goggle strap, not under it. Watch for head shaking or pawing in the first few minutes; both mean the fit needs adjustment.
Product facts
- V2 Replacement Lenses Rex Specs: Replacement lenses fit the original large Rex Specs V2 goggles and are sold separately in several mirror colors. Confirm your dog wears V2 goggles before ordering, because these lenses will not fit other frame generations.
V2 Replacement Lenses Rex Specs - Rex Specs Ear Pro: Rex Specs Ear Pro comes in three sizes and is sized by measuring head circumference just in front of the ears. Measure before you order so the cups sit correctly and protect hearing without slipping.
Rex Specs Ear Pro
