Price: $69.99
(as of Feb 26, 2026 00:02:39 UTC – Details)
Product description
Polyfit PL8 Backpack
The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Polyfit PL8 Backpack Merchant Video
Pl8 Backpack
Ruck Training
45 lbs (20 kg) Max
Capacity
40 LB Max
Rucking
Training Type
Rucking
Intermediate-Advance
Users
Beginner-Advance
No. Sold Separately
Is Weight Included?
No. Sold Separately
45 lbs (20 kg) Max
Capacity
25, 35, 45 LB sizes
Rucking
Training Type
Vest & Rucking
Intermediate-Advance
Users
Intermediate-Advance
No. Sold Separately
Is Weight Included?
Yes, Iron Bars
45 lbs (20 kg) Max
Capacity
40 LB max
Rucking
Training Type
Vest & Rucking
Intermediate-Advance
Users
Beginner-Advance
No. Sold Separately
Is Weight Included?
No. Sold Separately
Rucking Backpack 
Warrior Vest 
Fortify Vest 
What size weight plates does the backpack fit?
This backpack is designed for Olympic-size weight plates with a 2-inch center hole, up to 17.5″ in diameter and 2.5″ thick. It can hold one large plate or multiple smaller plates, with a recommended max load of 45 lbs (20 kg) for safe use.
Does the backpack include weight plates?
No, weight plates are not included. The backpack is designed to hold Olympic-style plates that you already own.
Will this backpack fit my body type?
Yes. This rucking backpack is designed as one size fits most, accommodating body types from Extra Small to Extra Large (XS–XL). It features adjustable shoulder, sternum, and waist straps so you can dial in a secure fit.
Is this backpack good for rucking, cardio, and endurance training?
Yes! It’s great for rucking, hiking, and endurance-style bodyweight training, offering a stable, no-bounce carry so you can move naturally without the load shifting.
How do I clean the backpack?
To clean, simply wipe it down with a cloth and lukewarm water, then let it air dry completely. Avoid machine washing to preserve the backpack’s materials and structure.
【HIGH PERFORMANCE WEIGHT PLATE BACKPACK】 Built for Olympic-style plates, this weighted backpack locks weight tight for rucking and bodyweight training. Secure fit stays put during push-ups, pull-ups, squats, and dips—and it’s great for rucking, walking, hiking, and endurance training.
【COMPATIBLE WITH OLYMPIC PLATES (NOT INCLUDED)】Compatible with most gym plates up to 17.5″ in diameter and 2.5″ thick. Designed for 2-inch center hole Olympic-size weight plates found in home and commercial gyms—whether cast iron or bumper style. Olympic plate carrier holds one large or multiple smaller plates, with a recommended maximum load of 45 lbs (20 kg) for safe use.
【DUAL-LOCK SYSTEM | ZERO-BOUNCE CARRY】Our patent-pending design locks weight plates inside with quick-release steel buckles and outside with a compression system—keeping the load secure and bounce-free during rucks or workouts.
【STERNUM & WAIST SUPPORT | LOCKED-IN STABILITY】 Adjustable sternum and waist straps secure the load snug to your body for improved stability, balance and posture. Easily adjust for a custom fit and better weight distribution in any workout.
【DURABLE MATERIALS | BUILT TO LAST】 Built from tough 600D polyester with reinforced stitching, rugged zippers, and a water-resistant coating for easy wipe-clean care (not machine washable). Tactical-grade aluminum quick-release buckles ensure durability and fast on/off during intense training.