Waterproof Backpack with Phone Window: Benefits for Navigation and Outdoor Use

Sealock manufactures the waterproof backpack with phone window for wholesale and OEM buyers worldwide, built for a specific job: keeping a phone sealed and dry while still letting the wearer read a map or GPS track on the move. The transparent window turns the pack itself into a navigation surface, so the phone never has to come out in the rain or near the water. The sections below set out how the window works and why it matters for navigation and outdoor use.

1. Company Overview

Sealock (YiFuLong Outdoor Gear Co., Ltd.) has designed and produced welded waterproof bags for over 20 years, operating two facilities in Dongguan, China and Ho Chi Minh City, Vietnam, and produces for international outdoor brands including OSPREY, KAILAS, Helly Hansen, and CHUMS. Production is held to international compliance and social-audit standards.

• Established: 2003 (20+ years in waterproof bag manufacturing)
• Facilities: Dongguan, China | Ho Chi Minh City, Vietnam
• Certifications: ISO9001, BSCI, SMETA, HIGG, GRS, SCAN, CSR
• Services: OEM / ODM, custom logo, color, and capacity

2. How the Window Works Without Breaking the Seal

The window is engineered as part of the waterproof shell, not a hole cut into it. Sealock welds a transparent TPU panel into the pack face by the same 27.12 MHz high-frequency process used on the body seams, so the window and the body form one continuous skin with no needle holes. The TPU film is thin enough to transmit capacitive touch, which means the screen can be read and operated through the panel while the pack stays sealed. A roll-top or rated closure keeps the rest of the compartment dry.

3. Benefits for Navigation

For anyone moving by map, a phone window backpack changes how navigation works on the trail or the water:

• Glance-and-go routing: check position, heading, and track without stopping to dig the phone out
• No exposure in bad weather: the phone stays dry in rain, spray, or a capsize, exactly when navigation matters most
• Fewer dropped phones: the device never leaves the sealed pocket over water or rough ground
• Battery protection: the phone stays warmer inside the pack in cold conditions, where exposed screens drain fast
• Hands free: chest- or strap-mounted window placement keeps both hands on poles, a paddle, or handlebars

4. Benefits for Wider Outdoor Use

The window pays off beyond pure navigation. On the water — kayaking, rafting, sailing — it keeps charts and tracking visible through spray while the pack floats sealed. On the bike it works as a route display without a separate handlebar mount. At the trailhead or in transit it lets the wearer scan messages and tickets without unpacking. In every case the logic is the same: the phone stays protected inside a fully waterproof pack, yet remains usable, which removes the constant open-close cycle that lets water in.

5. Sealock Phone Window Range

The range below leads with the 28L kayaking backpack with phone window and covers related Sealock window models, with verified specifications and product pages.

Image	Model / Series	Capacity	Material	Window	Best for	Product Page
	Waterproof Backpack for Kayaking 28L (Red, Phone Window)	28L	TPU composite	Front phone window	Paddling, navigation	View
	Hiking Backpack 38L with Yellow Window	38L	TPU composite	Map/phone window	Overnight, trail navigation	View
	Dry Bag with Phone Window	10–20L	500D PVC + TPU window	Front phone window	Lightweight, water sports	View
	Kayaking Dry Bag with Window	Multiple	500D PVC + TPU window	Nav window + D-ring	Deck-mounted navigation	View

6. Quality Control

Sealock applies a three-stage control to every batch before shipment. The laboratory test suite covers a load test of over 1,500 cycles, tensile strength, bonding strength, salt spray, friction resistance, color fastness, and color difference, plus a full water immersion test to verify overall waterproofing. The welded window area receives an additional bonding and immersion recheck, since it is the most demanding seam on the pack. Inspection runs in three stages: IQC checks incoming fabric and hardware, IPQC samples welds and the window seal in line, and OQC performs AQL sampling, batch immersion testing, and signed gold-sample comparison, with optional SGS/QIMA third-party inspection on request.

7. OEM / ODM Customization and Cooperation

Sealock supports full customization for brand and distributor orders. Standard terms:

• MOQ: 300 pcs per model
• Customization: window position and size to a buyer's target phones, logo, color (standard high-visibility red, green, orange), capacity, and fabric (TPU / PVC)
• Sampling: 7–10 working days
• Bulk lead time: confirmed at quotation, based on order quantity
• Trade terms: FOB Guangdong; other terms negotiable

Workflow: (1) inquiry and specification confirmation; (2) quotation and trade terms; (3) sampling and approval; (4) bulk production under the three-stage QC; (5) final inspection and shipment. See the OEM / ODM services page.

8. FAQ

Q: Can I use the phone's touchscreen through the window?
A: Yes. The transparent TPU panel transmits capacitive touch, so swiping, tapping, and zooming a map all work without removing the phone from the sealed pack.

Q: Is the window as waterproof as the rest of the backpack?
A: Yes. The window is high-frequency welded into the pack face as one continuous, needle-hole-free skin, and it passes a full water immersion test plus an additional window-seal recheck.

Q: Does the window fit large phones?
A: The standard window fits mainstream large-screen phones, and the window size and position can be customized to a buyer's target models.

Q: What is the minimum order quantity and sampling time?
A: MOQ is 300 pcs per model, with samples produced in 7–10 working days. Bulk lead time is confirmed at quotation based on quantity and customization scope.

Request a Quotation

For specifications, samples, or pricing on the 28L phone-window backpack or any model in the range, submit an inquiry. Sealock responds to procurement enquiries within 24 hours.