Frequently Asked Questions
Everything you need to know before shopping with Pet Express.
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The M5 MOLLE Light Harness is built to be the best-fitting harness for small breeds — lightweight, durable, and made with premium materials, built tough for hard, rough use, with airflow that keeps your dog comfortable through walks, adventures, and even working shifts (small breed working K9s wear the M5 on duty). Its laser-cut construction shapes a tailored, low-profile fit no bulky harness can match — a fit that's actually shaped around your dog's body, not just strapped on.
Three quick side-release buckles make it fast to put on and take off, with multiple leash attachment options for however you like to guide your dog. A top-center grab handle gives you added control and support whenever you need it.
Keep your dog cool and comfortable — the chest is built as a slim, minimal chest plate since that's where dogs need cooling most, while laser-cut ventilation slots on the body panel maximize airflow even further.
🐾 Have a long-bodied breed like a dachshund? Check out our D5 Dachshund Harness, engineered specifically for their body type.
FEATURES
SIZING
| Size | Chest | Neck | Length | Suggested Weight |
|---|---|---|---|---|
| 2XS (Long) | 13"–18" (33–46cm) | 11"–15" (28–38cm) | 6.5" (16.5cm) | 6–18 lb (2.7–8.2kg) |
| 3XS (Long) | 11"–15" (28–38cm) | 9"–14" (23–36cm) | 5.5" (14cm) | 3–6 lb (1.2–2.7kg) |
| 4XS (Short) | 8"–15" (20–38cm) | 8"–13" (20–33cm) | 5" (13cm) | 2–5 lb (0.9–2.3kg) |
Use either your dog's weight or chest measurement to find the right fit. If your dog is in-between sizes: wide chest/shoulders → size up. Narrow chest/body → size down.



Free shipping on orders over $50. Standard delivery takes 3-5 business days. Express delivery available at checkout.
The M5 MOLLE Light Harness is built to be the best-fitting harness for small breeds — lightweight, durable, and made with premium materials, built tough for hard, rough use, with airflow that keeps your dog comfortable through walks, adventures, and even working shifts (small breed working K9s wear the M5 on duty). Its laser-cut construction shapes a tailored, low-profile fit no bulky harness can match — a fit that's actually shaped around your dog's body, not just strapped on.
Three quick side-release buckles make it fast to put on and take off, with multiple leash attachment options for however you like to guide your dog. A top-center grab handle gives you added control and support whenever you need it.
Keep your dog cool and comfortable — the chest is built as a slim, minimal chest plate since that's where dogs need cooling most, while laser-cut ventilation slots on the body panel maximize airflow even further.
🐾 Have a long-bodied breed like a dachshund? Check out our D5 Dachshund Harness, engineered specifically for their body type.
FEATURES
SIZING
| Size | Chest | Neck | Length | Suggested Weight |
|---|---|---|---|---|
| 2XS (Long) | 13"–18" (33–46cm) | 11"–15" (28–38cm) | 6.5" (16.5cm) | 6–18 lb (2.7–8.2kg) |
| 3XS (Long) | 11"–15" (28–38cm) | 9"–14" (23–36cm) | 5.5" (14cm) | 3–6 lb (1.2–2.7kg) |
| 4XS (Short) | 8"–15" (20–38cm) | 8"–13" (20–33cm) | 5" (13cm) | 2–5 lb (0.9–2.3kg) |
Use either your dog's weight or chest measurement to find the right fit. If your dog is in-between sizes: wide chest/shoulders → size up. Narrow chest/body → size down.



Everything you need to know before shopping with Pet Express.