Backpacks >>
HKM-321939 Large Capacity Waterproof Laptop Backpack for School and Travel with Custom Logo Option
Large Capacity Waterproof Laptop Backpack
Engineered for students, professionals, and travelers who demand uncompromising protection, intelligent organization, and a refined modern silhouette.
Where function meets refined design
The HKM-321939 redefines what a daily carry backpack can be. Built around the reality that your gear faces unpredictable weather, crowded commutes, and long days, this backpack integrates advanced waterproof materials with a spacious, thoughtfully compartmentalized interior. Whether you are navigating a rain-soaked campus, boarding a cross-country flight, or heading to a co-working space, the HKM-321939 keeps your laptop, textbooks, accessories, and personal essentials dry, organized, and instantly accessible.
Every detail—from the padded, ergonomic shoulder straps to the discreet custom logo panel—has been refined to deliver a premium experience that rivals backpacks at twice the price point. The aesthetic is deliberately understated: clean lines, a structured silhouette, and a matte finish that resists scuffs and fingerprints, ensuring the backpack looks sharp season after season.
Core capabilities
Four pillars define the HKM-321939 experience. Each has been engineered to solve real-world pain points that lesser backpacks simply ignore.
Full waterproof protection
High-density water-repellent fabric with sealed zippers and a reinforced base panel. Rain, splashes, and accidental spills are deflected before they reach your gear.
Massive organized capacity
Multiple dedicated compartments accommodate laptops up to 17.3 inches, plus textbooks, a change of clothes, tech accessories, and daily essentials—all with intuitive pocket placement.
Ergonomic padded straps
Contoured, multi-layer foam shoulder straps distribute weight evenly across your shoulders. Breathable mesh backing reduces heat buildup during extended wear.
Custom logo personalization
A dedicated branding panel allows for clean logo application. Ideal for corporate gifting, team uniforms, school insignias, or building your personal brand identity.
Every detail considered
Beyond the headline features, the HKM-321939 incorporates dozens of thoughtful design decisions that elevate the daily carrying experience.
Multi-compartment intelligent layout
A padded laptop sleeve, a dedicated tablet pocket, a spacious main compartment, a front organizer panel with pen slots and a key clip, plus two side pockets for water bottles or an umbrella. Everything has its place.
Reinforced base panel
The bottom of the backpack features an abrasion-resistant, double-layered panel that stands up to being set down on rough surfaces—from concrete sidewalks to lecture hall floors—without wearing through.
360-degree reflective accents
Subtle reflective piping integrated into the front panel and shoulder straps enhances visibility during low-light conditions—a critical safety feature for cyclists, pedestrians, and anyone commuting after dark.
External USB charging port
A built-in external USB port with an internal cable pass-through lets you connect a power bank inside the backpack and charge your devices on the move—no more fumbling with cables in crowded spaces.
Anti-theft hidden pocket
A discreet, zippered pocket on the back panel sits flush against your body when worn, providing a secure location for a passport, wallet, or smartphone that is virtually impossible for pickpockets to access.
Technical specifications
Precision engineering backed by measurable data. Every specification reflects rigorous testing and real-world validation.
Material science meets everyday durability
The HKM-321939 is constructed from a carefully selected high-density polyester fabric that has been treated with a polyurethane (PU) coating on the interior face. This dual-layer approach creates a formidable barrier against moisture: the tightly woven polyester exterior causes water to bead and roll off on contact, while the PU backing ensures that any moisture that does penetrate the outer weave is stopped before it reaches the main compartment.
● Why PU-coated polyester?
Compared to standard nylon or canvas, PU-coated polyester offers an optimal balance of weight, flexibility, and water resistance. It is lighter than waxed canvas, more abrasion-resistant than untreated nylon, and maintains its water-repellent properties through hundreds of flex cycles. This means the backpack remains protective even after prolonged daily use, folding, and packing.
● Zipper engineering
All external zippers feature reverse-coil construction with a tight tooth profile that minimizes gaps where water could seep through. The zipper pulls are oversized and textured for easy grip with gloves or wet hands, and each pull is reinforced at the attachment point to prevent snapping under tension.
● Strap foam technology
The shoulder straps utilize a three-layer foam composite: a high-density structural core for load-bearing stability, a medium-density middle layer for shock absorption, and a low-density memory foam top layer that conforms to the wearer's shoulder shape over time. This progressive density design reduces pressure points by up to 40% compared to single-density foam straps.
Your brand, perfectly placed
The HKM-321939 includes a dedicated, flat-surfaced logo panel engineered to showcase custom branding with crisp clarity. Whether you are outfitting a corporate team, creating merchandise for an event, or building a personal brand, the panel's dimensions and surface texture have been optimized for embroidery, screen printing, heat transfer, and debossing techniques.
Ideal use cases: Corporate gifting programs, university welcome kits, conference swag, sports team gear, brand merchandise, and personalized graduation gifts. The panel's placement ensures visibility without overwhelming the backpack's clean design language.
Corporate identity
Outfit your entire team with professionally branded backpacks that project cohesion and attention to detail at every client meeting and industry event.
Academic & institutional
Universities, colleges, and schools can reinforce campus spirit with logo-branded backpacks that students are proud to carry every day.
Frequently asked questions
Quick answers to the most common inquiries about the HKM-321939.
Is the backpack fully submersible or just water-resistant?
The HKM-321939 is designed with a high level of water resistance rated at approximately IPX4 equivalent, meaning it can withstand splashing water from any direction and moderate to heavy rain. The fabric causes water to bead and roll off, and the PU coating prevents penetration. However, it is not intended for full submersion underwater. For typical daily use—commuting in rain, walking across campus in a downpour, or accidental spills—it provides excellent protection for your belongings.
What size laptop can the dedicated compartment accommodate?
The padded laptop compartment is designed to fit laptops with screen sizes up to 17.3 inches (approximately 44 cm measured diagonally). The internal sleeve measures 16.5 × 11.4 × 1.2 inches (42 × 29 × 3 cm), providing a snug and secure fit for most 15.6-inch and 17.3-inch notebooks, including popular models from Dell, HP, Lenovo, Apple, and ASUS. A secondary tablet sleeve fits devices up to 12.9 inches.
How does the custom logo process work?
The backpack features a designated panel optimized for logo application. You can work with a local embroidery or printing service, or coordinate with our support team for bulk customization options. The panel's smooth, flat surface accepts embroidery, screen printing, heat transfer vinyl, and debossing. For corporate orders, we recommend vector-format artwork (AI, EPS, or SVG) for the sharpest results. The panel area measures approximately 5.9 × 3.9 inches (15 × 10 cm).
Is the USB port built into the backpack itself?
The external USB port is a pass-through connector integrated into the backpack's side panel. It does not include a built-in battery. You simply connect your power bank to the internal USB cable inside the backpack, and then plug your device into the external port. This design keeps your power bank safely inside while allowing convenient charging access. The internal cable is compatible with standard USB-A power banks.
Can the backpack stand upright on its own?
Yes. The HKM-321939 features a reinforced, flat-bottom base panel with structural piping along the edges. When packed with reasonable weight distribution, the backpack stands upright independently on flat surfaces. This is particularly useful in classroom settings, under office desks, or while waiting in airport terminals, as it prevents the bag from toppling over and keeps the contents organized.
How do I clean and maintain the backpack?
For routine cleaning, wipe the exterior with a damp cloth and mild soap. Avoid machine washing, as the agitation can degrade the PU coating and damage the structural foam in the straps. For stubborn stains, use a soft-bristled brush with lukewarm water and a small amount of gentle detergent, then air dry away from direct heat sources. The interior can be spot-cleaned with a damp cloth. With proper care, the HKM-321939 will maintain its appearance and protective qualities for years.
The HKM-321939 advantage
In a market flooded with disposable fast-fashion backpacks, the HKM-321939 stands apart through its commitment to material integrity, user-centered design, and enduring style. This is not a backpack you replace every semester—it is a long-term investment in organized, protected, and comfortable daily carry.
Designed for: University students carrying heavy course loads, digital nomads navigating co-working spaces, professionals commuting in unpredictable weather, travelers seeking a reliable personal item, and anyone who values the peace of mind that comes from knowing their gear is safe, dry, and exactly where they expect it to be.
Purchase with confidence
Every HKM-321939 order is backed by comprehensive coverage, ensuring your satisfaction from the moment you click buy through years of daily use.
Free shipping on all orders
Complimentary standard delivery with every purchase. No minimums, no hidden fees.
180 days purchase protection
Extended coverage against manufacturing defects for a full six months after delivery.
30 days money-back guarantee
Not completely satisfied? Return within 30 days for a full, no-questions-asked refund.
24 months warranty service
Comprehensive two-year warranty covering materials, workmanship, and hardware components.
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
