About Cryozin
Since 1999, Cryozin has manufactured reusable hot and cold packs for brands, distributors and healthcare buyers, providing product development, OEM/ODM production, quality control, private-label packaging and global order support.
Cryozin and Dongguan Zejin Biotechnology Co., Ltd.
Dongguan Zejin Biotechnology Co., Ltd., founded in 1999, is a professional enterprise specializing in the development, sales and service of ice packs. Based in Dongguan, Guangdong with convenient transportation, we also run an overseas factory in Cambodia to fulfill orders from global customers.
Our experienced team implements strict quality control and thoughtful customer service. We provide in-depth customization to fully meet client needs. FDA establishment registration or device listing, where applicable, does not represent product approval. Our products hold CE and other certifications, selling well across China and exporting to the U.S., Europe and other regions, winning wide recognition.
We welcome orders worldwide. Supported by a professional R&D and customer service team, we assist with both catalog product selection and new product development. Feel free to discuss your purchasing needs with us.
About Cryozin
A hot and cold pack manufacturer built around B2B product programs
Cryozin is the international hot and cold therapy brand of Dongguan Zejin Biotechnology Co., Ltd. Since 1999, we have supported brands, distributors and healthcare buyers with product development, OEM/ODM manufacturing and repeat-order supply. Our role is to turn a purchasing brief into a clear, reviewable product specification—not simply to supply a generic ice pack.
Products and customers
What Cryozin manufactures—and who we support
A successful hot or cold pack program starts with the intended use, target market and sales channel. Cryozin helps buyers compare practical product formats and define the commercial details needed for sourcing.
Temperature-therapy product families
Our work centers on reusable hot and cold products for comfort, sports recovery, healthcare, wellness and branded retail programs. Buyers can start with an existing format or discuss a customized specification.
Built for different purchasing models
We support buyers who need more than a one-time product. The objective is a specification that can be reviewed, sampled and repeated as the program grows.
OEM capabilities
How we help define a custom or private-label ice pack
The right specification depends on how the product will be used, sold and transported. Our OEM and ODM discussions are organized around the decisions below so that buyers can evaluate trade-offs early.
Format and application
Review the body area, therapy purpose, intended temperature use, pack dimensions and reusable-use expectations.
Materials and construction
Discuss cover feel, flexibility, sealing approach, gel or filling considerations and other requirements tied to the application.
Brand presentation
Plan logo placement, color direction, printed artwork, care information and the visual experience your customers should receive.
Retail and shipping packaging
Align individual packaging, labeling, cartons and pack-out requirements with your channel and logistics needs.
Samples and specification review
Confirm the evaluation points before mass production, including appearance, dimensions, function and approved artwork.
Repeat-order consistency
Keep approved specifications, quality expectations and packaging details clear for future purchasing cycles.
Project workflow
From product brief to repeat production
A structured process reduces avoidable revisions. Actual steps vary by product and project, but most B2B programs move through the following stages.
Quality and documentation
Quality requirements should be defined for the product and destination market
Quality is most useful when it is connected to an agreed specification. We work with buyers to clarify the product, packaging and documentation points that should be reviewed for their program.
A better first inquiry
What to prepare before contacting a manufacturer
You do not need a finished technical file. A short commercial brief is enough to start, but these details help us respond with more relevant questions and fewer assumptions.
Buyer resources
Continue your hot and cold pack sourcing research
Use these focused guides to compare options before requesting a quote. They are designed to help purchasing teams build a clearer specification.
About Cryozin FAQ
Questions buyers often ask about our company
Is Cryozin a manufacturer or a trading company?
Cryozin is the international hot and cold therapy brand of Dongguan Zejin Biotechnology Co., Ltd. Our company focuses on the development, manufacturing, sales and service of reusable temperature-therapy products, with operations in Dongguan and an overseas production base in Cambodia.
Can Cryozin manufacture private-label ice packs?
Yes. We support OEM and ODM discussions covering product format, materials, dimensions, logo application, artwork, individual packaging and shipping cartons. The suitable options depend on your intended use, order plan and target market.
Can I start from an existing product instead of developing a new mold?
Yes. Buyers can begin with a catalog product and customize selected commercial details, or discuss a more tailored development route. Sharing a reference image, target size and sales channel helps us identify a practical starting point.
What information is needed for a quotation?
Please provide the product or reference, target market, estimated quantity, branding and packaging requirements, delivery destination and preferred timing. If some details are not yet confirmed, tell us the intended application and we can help organize the next questions.
What quality or compliance documents are available?
Available documentation depends on the product and market. Cryozin displays selected certificates and reports on this page and provides a dedicated certification guide. Buyers should share destination-market or channel requirements so the relevant documents and any additional testing needs can be reviewed.
Does Cryozin support repeat orders and long-term programs?
Yes. Our B2B workflow is intended to support both initial projects and repeat purchasing. Keeping the approved specification, artwork, packaging and inspection points clear helps reduce variation between purchasing cycles.
Tell us what your hot or cold pack needs to achieve
Share the application, market, quantity, branding and packaging requirements. We will help organize the product questions that matter before quotation and sampling.
Certifications, Quality Systems and Product Documentation
