Established in 1999
Ice Pack Manufacturer for Custom & Private-Label Programs
OEM/ODM Product Development · Quality-Controlled Manufacturing
1999
Manufacturing since
6,000 m²
Production facility
100+
Mature product designs
2
China & Cambodia factories
Global
Compliance support
Industry Solutions
Tailored hot and cold therapy solutions for personal care, sports recovery, outdoor use, post-operative care, and pet wellness.
Personal Care
Reusable hot and cold pack formats for personal-care brands, including masks, cushions, flat packs, and wearable designs. Final materials, preparation instructions, user group, claims, and packaging are confirmed for each approved product.
Sports Injuries
Reusable hot and cold packs and wraps for sports product lines. Buyers should define fit, flexibility, retention, preparation instructions, durability, branding, packaging, and any substantiated performance claims for the approved design.
Outdoor Camping
Cooler packs and PCM wearable formats for outdoor product programs. Buyers should define the target temperature range, pack-out or wear conditions, test method, fit, recharge method, storage, labeling, and packaging before approval.
Postoperative Care
Body-specific reusable packs for postoperative product programs. The finished product’s intended use, supporting evidence, instructions, warnings, and regulatory pathway must be confirmed for the target market before commercial release.
Pet Care
Reusable mats and pack formats for pet-care programs. Product specifications should address animal size, supervision, puncture and chewing risk, cleaning, preparation, instructions, warnings, and labeling; heatstroke, postoperative, or therapeutic claims require qualified review.
Customization Process
We can accept ODM/OEM orders. We have the ability to research and design, and can develop and produce customized products according to your design. Click the button below to see how we do each step! For private-label program scope and project inputs, review our OEM ice pack program.
View customization details
CONSULTATION
Communicate your needs and product requirements.
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DESIGN & DEVELOPMENT
We provide professional design and customized solutions.
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QUOTE & ORDER
Confirm the plan, quotation and order details.
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PRODUCTION
Mass production with strict process control to ensure consistent quality.
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DELIVERY
Custom packaging and reliable shipping coordination for safe, on-time delivery.
Material Customization
We help you balance touch, durability, cost, compliance and thermal performance—then document the specification for repeatable production.
OUTER MATERIAL
- PVC
- TPU
- Nylon
- Lycra
- Other
THERMAL CORE
- Gel
- Gel Bead
- PCM
- Sodium Acetate
- Other
Quality Control
From incoming materials and gel formulation to filling, sealing, performance testing, packaging and final shipment checks, we follow project-specific controls to support consistent production against approved specifications.
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Raw Material Inspection
Incoming materials are reviewed against the approved specification and agreed records.
In-Process Control
Production controls are monitored against the approved process and project requirements.
Product Testing
Project-specific checks may cover seal integrity, durability, thermal behavior, and safety requirements.
Final Inspection
Final inspection follows the agreed sampling plan and release criteria before packing.
Secure Packaging & Delivery
Professional packaging and reliable delivery to protect your goods.
Dongguan Zejin Biotechnology Co., Ltd. - Cryozin
Cryozin is the export brand of Dongguan Zejin Biotechnology Co., Ltd., established in 1999 in Dongguan, Guangdong. We develop and manufacture reusable gel packs, wearable hot and cold therapy products, PCM cooling products and private-label programs for international brands and distributors. Production and documentation requirements are reviewed for each product, destination market and approved specification. Our team supports catalog selection, custom development, sampling, packaging and repeat production.Documentation for Global Projects
ISO management-system certificates and product-specific CE, RoHS, REACH, material-safety and testing documents are reviewed according to the selected product and destination market. FDA establishment registration or device listing, where applicable, does not represent product approval. Request the current document set for your project before placing an order.
Best Sellers
Explore reusable hot and cold therapy products, wearable wraps and private-label formats. Contact us to confirm current specifications, customization options, sample availability and after-sales terms for your project.
Why choose us
Reliable Manufacturing Support
Product Development
Product Development
Quality & Compliance Support
Quality & Compliance Support
Production Capacity & Coordination
Production Capacity & Coordination
Shipping & Logistics Coordination
Shipping & Logistics Coordination
Yes, absolutely. Our factory is ISO 13485 certified (Medical Devices Quality Management). All our products meet the stringent safety standards of the US and EU markets. We can provide full documentation, including FDA establishment registration or device listing information where applicable (which does not represent FDA product approval), CE (MDR) certification, MSDS, REACH, and RoHS reports.
Material and safety documentation depends on the exact gel, film, ink, textile, intended contact, and destination market. Cryozin can review applicable SDS, material declarations, and project-specific test records where available. Leakage risk should be controlled through agreed seal, integrity, conditioning, sampling, and handling criteria; no reusable pouch is immune to every puncture, cut, overload, or aging condition.
Flexibility depends on gel formula, fill ratio, film, storage temperature, and conditioning time. Some formulations can be evaluated for soft-freeze behavior, but the finished product should be approved under agreed test conditions rather than a universal temperature or therapeutic-performance claim.
Yes, we are a direct factory with strong R&D capabilities. We provide full OEM and ODM services. You can customize:
- Product: Shapes, sizes, fabric materials (e.g., plush backing, non-woven fabric), gel colors, and formulations.
- Branding: Silk-screen printing, debossed logos, or custom fabric labels.
- Packaging: Color boxes, zipper bags, frosted bags, or PDQ display boxes suitable for retail.
Manufacturing Support for Global Brands
From product development and quality documentation to production and delivery, our team supports OEM and private-label programs for global customers.
