Backpacks >>
HKM-485779 Waterproof Large Capacity School and Travel Backpack with USB Charging and Headphone Jack
Waterproof Large Capacity Backpack
Engineered for modern life, the HKM-485779 combines advanced waterproof protection with a spacious interior and integrated charging technology. From campus commutes to weekend travel, this backpack delivers dependable performance with a refined aesthetic.
Core Features
Purpose-built details that set this backpack apart.
Premium Waterproof Protection
Crafted from high-density waterproof fabric with sealed zippers, the HKM-485779 shields your belongings from rain, splashes, and unexpected weather. The hydrophobic coating causes water to bead and roll off instantly.
Expansive Storage Capacity
With a generous main compartment that accommodates textbooks, a laptop up to 15.6 inches, clothing layers, and daily essentials, this backpack keeps everything organized without feeling bulky.
Built-In USB Charging Port
A conveniently located external USB port lets you connect a power bank inside the bag and charge your devices on the go. Stay powered through long commutes and travel days without opening your backpack.
Integrated Headphone Jack
An external audio port allows you to connect wired headphones or earbuds without unzipping the bag. Perfect for listening to music, joining calls, or following audio content while keeping your device safely stored.
Advanced Weather Defense
Understanding the waterproof engineering behind the HKM-485779.
Hydrophobic Fabric Technology
The exterior shell of the HKM-485779 utilizes a multi-layer laminate construction. The outer layer features a densely woven polyester with a DWR (Durable Water Repellent) treatment, causing moisture to bead up and slide off rather than soaking into the fibers. Beneath this, a microporous membrane blocks liquid water while allowing water vapor to escape, preventing internal condensation. This combination ensures your laptop, documents, and electronics remain dry even during sustained exposure to moderate rainfall. Independent lab tests confirm the fabric withstands a water column pressure exceeding 3,000 mm — a benchmark for reliable everyday weather protection.
Sealed Zipper System
Standard zippers are a common entry point for water. The HKM-485779 addresses this with custom-designed reverse-coil zippers coated with a polyurethane seal. When closed, the zipper teeth interlock tightly, and a rubberized lip covers the gap, creating a barrier that redirects water away. Stress points at the zipper ends are reinforced with welded seams for extra durability. This design has been tested through thousands of open-close cycles without compromising water resistance.
Designed for All-Day Comfort
Ergonomic features that make a difference during extended wear.
Padded Back Panel with Airflow Channels
The back panel features multi-layer foam padding contoured to match the natural curve of the spine. Deep airflow channels between the padding zones promote ventilation, reducing heat buildup during warm-weather commutes. The padding density is calibrated to balance cushioning with structural support, preventing the bag from sagging under heavy loads while maintaining a soft feel against the body.
Adjustable S-Shaped Shoulder Straps
The shoulder straps follow an ergonomic S-curve that mirrors the natural contour of the shoulders and chest. Generously padded with high-resilience foam and lined with breathable mesh, they distribute weight evenly across the shoulders. Quick-adjust buckles allow for length changes of up to 5.9 inches (15 cm), accommodating users of various body types and ensuring the backpack sits at the optimal height for spinal alignment.
Technical Specifications
Key measurements and material details at a glance.
Laptop Compartment
Fits up to 15.6" (39.6 cm)
Dimensions
18.5 × 12.5 × 7.5 in (47 × 32 × 19 cm)
Weight
1.8 lbs (0.82 kg)
Capacity
Approx. 35 liters
Material
Waterproof polyester with PU coating
USB Port Type
External USB-A (power bank required)
Built for Every Journey
Three core scenarios where the HKM-485779 excels.
Campus & Classroom
Carry textbooks, a laptop, notebooks, and daily essentials in organized compartments. The USB port keeps your phone charged between lectures, and the waterproof shell protects assignments from unexpected rain.
Daily Commute
Navigate crowded transit with a slim profile that doesn't sacrifice capacity. The padded back panel and ergonomic straps make longer commutes comfortable, while the headphone jack keeps you connected to audio on the move.
Weekend Travel
Pack clothing, toiletries, and gear for a short trip. The large main compartment fits everything for 2–3 days away, and the durable waterproof construction handles varied weather conditions at your destination.
Sleek, Modern Design
A minimalist aesthetic that transitions seamlessly between environments.
Minimalist Exterior with Clean Lines
The HKM-485779 avoids unnecessary embellishments in favor of a streamlined silhouette. Smooth surfaces, subtle branding, and a monochromatic color palette give it a refined appearance that pairs well with both casual attire and business-casual outfits. The design ethos draws from contemporary urban aesthetics, ensuring the backpack looks as good in a coffee shop as it does in a lecture hall or co-working space.
Discreet Pocket Layout
Multiple internal and external pockets are thoughtfully placed to maintain the clean exterior profile. A hidden front pocket provides quick access to frequently used items, while internal dividers keep electronics separated from bulkier items. Every zipper pull is finished with a soft-touch coating for quiet operation and a premium tactile feel.
Frequently Asked Questions
Answers to common inquiries about the HKM-485779.
Is this backpack fully waterproof or water-resistant?
What size laptop can the dedicated compartment hold?
How does the USB charging port function?
Is this backpack suitable for air travel as a carry-on?
How should I clean and maintain the waterproof material?
Can the headphone jack be used with wireless Bluetooth headphones?
What is the actual storage capacity of the main compartment?
Purchase with Confidence
Every HKM-485779 is backed by comprehensive coverage.
Free Shipping on All Orders
Complimentary standard shipping is included with every purchase, with no minimum order requirement. Your HKM-485779 arrives at your doorstep at no extra cost.
180 Days Purchase Protection
Enjoy extended peace of mind with six full months of purchase protection. If any manufacturing defect arises within 180 days, we will replace or repair the product at no charge.
30 Days Money-Back Guarantee
If you are not completely satisfied with your HKM-485779, return it within 30 days of delivery for a full refund. No questions asked, no restocking fees applied.
24 Months Warranty Service
Every HKM-485779 is covered by a comprehensive 24-month warranty against defects in materials and workmanship. Our support team is ready to assist with any warranty claims.
Every product we offer includes a 180-day purchase protection plan at no additional cost. This coverage extends beyond a standard warranty, reflecting our confidence in product quality and our ongoing commitment to your satisfaction.
The protection plan is designed to provide practical help in real-world situations. Whether you encounter a manufacturing issue, a performance problem, or an unexpected accident, our team is ready to assist with clear, fair solutions.
What Is Covered
Manufacturing Defects
We replace items with material or workmanship flaws at no charge.
Performance Failures
Free repair or replacement if the product fails under normal use.
Accidental Damage
One-time courtesy replacement at a reduced price.
Zero Hidden Fees
All shipping costs for replacements and returns are covered.
How to File a Claim
How This Differs from the Warranty
The 180-day purchase protection includes accidental damage and performance failures that are typically not covered by a standard warranty. It provides an additional layer of support during the first six months after purchase, giving you greater confidence and peace of mind.
We want you to be completely satisfied with your purchase. If for any reason you are not fully happy, you may return your item within 30 days of delivery for a full refund. No lengthy forms, no unnecessary questions.
Our return policy is built on a simple principle: if the product is not right for you, we will make it right. We understand that online shopping involves trust, and we work hard to earn that trust with every order.
Return Eligibility
30-Day Window
Request a return within 30 days of delivery.
Original Condition
Unworn or unused, with tags and original packaging.
Proof of Purchase
A receipt or order number is required.
Fast Refund
Refund processed within 10 business days.
How to Start a Return
Returns & Exchanges Overview
Damages & Exchanges
Please inspect your order as soon as it arrives. If the item is defective, damaged, or incorrect, contact us immediately so we can evaluate the issue and make it right. For exchanges, the fastest option is to return the original item and place a new order for the replacement.
We believe in the quality of our products, and we want you to share that confidence. Every product is backed by a 24-month warranty covering all structural and functional components, including zippers, buckles, straps, and fabric integrity.
The warranty is designed to be simple and accessible. You only need your proof of purchase to begin a claim, and our team will assess the issue promptly. If a manufacturing issue arises, we will make it right.
What the Warranty Covers
Comprehensive Coverage
Every part warranted for two full years.
Free Repair or Replacement
Whichever is faster, at no cost to you.
Quick Turnaround
Claims assessed within 1 business day.
Transferable
Warranty follows the product, not the owner.
How to File a Warranty Claim
Every order ships free—no minimums, no hidden fees. We currently deliver across the United States and are actively working to expand to more countries. We partner with reliable U.S. courier services to ensure your order arrives safely and on time.
Our delivery process is designed for transparency. From the moment you place your order to the moment it reaches your door, you receive clear updates at every stage. We carefully inspect each product before dispatch, and we provide tracking information as soon as your order ships.
Our U.S. Shipping Partners
USPS
Official national carrier with nationwide coverage.
UPS
Fast and reliable ground and express shipping.
FedEx
Express delivery with real-time tracking.
DHL eCommerce
Efficient parcel delivery for e-commerce shipments.
Delivery Process
Delivery Time Summary
Cancellations & Taxes
You may cancel your order at any time before it ships. All product prices include applicable taxes, and there are no additional VAT or customs fees for orders delivered within the United States.
Whether you have a question, need help with an order, or just want some advice, our support team is available around the clock. We don't just respond to messages—we work with you to find real solutions that fit your needs.
Our support specialists are trained to handle a wide range of requests, from product recommendations to technical troubleshooting. No matter the question, you can expect a professional and friendly response.
How We Can Help
Product Guidance
Our experts help you choose the right product.
Order Assistance
Modify orders, track shipments, or speed up delivery.
Warranty & Returns
Start claims or returns quickly and easily.
Technical Troubleshooting
Step-by-step solutions for product issues.
Contact Information
24/7 Phone
+1 (209) 280-3200
support@hekomart.com
Address
3401 Dale Rd, Modesto, CA 95356
Support Hours
Available 24 hours a day, 7 days a week
