performance when it matters most
The Thermal Performance system trusted across Healthcare, Defense and Outdoor Recreation
PHYSICIAN-DESIGNED thermal PERFORMANCE SYSTEMS
The Foundational Thermal Performance Platform
HEATJAC CORE™ is the flagship wearable thermal management platform from HEATJAC, designed to help users remain comfortable, focused, and effective in demanding environments.
Originally developed by a physician to address thermal comfort challenges experienced by healthcare professionals working in cold operating rooms, HEATJAC CORE™ was created from a clinical understanding of how environmental conditions can affect comfort, concentration, and performance during long hours on the job.
Its patented wearable architecture provides a versatile foundation for multiple thermal management configurations without sacrificing mobility, fit, or comfort. Lightweight, low-profile, and designed for extended wear, HEATJAC CORE™ can be worn discreetly beneath scrubs, uniforms, workwear, tactical gear, or outdoor apparel.
Today, HEATJAC CORE™ is trusted across healthcare, industrial, commercial, outdoor, and recreational environments where maintaining comfort can directly impact performance, productivity, and endurance.
For applications requiring additional thermal support, HEATJAC CORE™ is compatible with optional heating and cooling accessories, allowing users to adapt to changing environmental conditions and personal comfort preferences while maintaining the same streamlined wearable platform.
Key Features
Patented Thermal Cell Architecture
HEATJAC CORE™ utilizes a patented wearable architecture designed to support configurable thermal management solutions while maintaining comfort, mobility, and a low-profile fit beneath workwear, uniforms, and outerwear.
Professional-Grade Thermal Platform
Originally developed to address thermal comfort challenges in healthcare environments, HEATJAC CORE™ serves as a versatile thermal wearable platform that can be adapted across medical, industrial, commercial, outdoor, and specialized applications. Its modular architecture allows users to tailor their thermal experience while maintaining comfort, mobility, and a professional appearance.
Thermal Cell Array™ Design
Strategically placed ventilation and thermal management zones support comfort during extended wear.
Ultra-Low Profile Construction
Designed to disappear beneath clothing, uniforms, scrubs, tactical gear, and outerwear.
Lightweight & Non-Restrictive
Allows natural movement without the weight and stiffness associated with traditional wearable thermal solutions.
Breathable Mesh Back Panel
Promotes airflow and comfort while reducing heat buildup during prolonged use.
Adjustable Fit System
Customizable straps and low-profile buckles provide a secure fit across a wide range of body types and applications.
Machine Washable
Built for real-world use and repeated wear across professional, tactical, and recreational environments.
Designed to Compatible with Heating and Cooling Accessories
HEATJAC CORE™ is designed as a versatile thermal management platform capable of supporting both warming and cooling accessory systems, allowing users to adapt to changing environmental conditions and personal comfort preferences.
Ideal Applications
Healthcare & Surgical Environments
Military & Defense Operations
Law Enforcement
First Responders
Industrial & Manufacturing Facilities
Warehousing & Logistics
Construction & Utilities
Outdoor Recreation
Hunting & Fishing
Hiking & Camping
Skiing & Snowboarding
Everyday Cold-Weather Use
What's Included
HEATJAC CORE™ Thermal Wearable Platform
Integrated Heat-Reflective Thermal Inserts
Adjustable Fit Harness System
Care & Fit Guide
Supplemental warming elements sold separately.
Warmth Without Bulk. Performance Without Compromise.
HEATJAC CORE™ delivers a smarter approach to thermal comfort by helping the body retain and utilize its own heat more efficiently. Whether you're standing through a lengthy procedure, operating in challenging conditions, working outdoors, or pursuing your next adventure, HEATJAC CORE™ provides the foundation for all-day thermal performance.
Reflect Heat. Retain Comfort.
The HEATJAC REFLECT™ vest is a lightweight thermal garment engineered to help your body retain warmth without the bulk of traditional insulated apparel. Utilizing HEATJAC's proprietary heat-reflective lining technology, REFLECT™ returns radiant body heat back toward the wearer, helping maintain comfort in cold environments while preserving mobility and freedom of movement.
Designed for healthcare professionals, outdoor enthusiasts, cold-sensitive individuals, and anyone who spends extended periods in challenging temperatures, REFLECT™ delivers practical warmth in a streamlined, low-profile design that layers comfortably beneath uniforms, scrubs, jackets, and everyday clothing.
Integrated warming pockets allow REFLECT™ to be paired with compatible long-duration warming elements (sold separately) for additional thermal support when conditions demand it.
Key Features
Reflects up to 95% of radiant body heat
Proprietary heat-reflective thermal lining
Lightweight, low-profile construction
Designed for all-day wear
Integrated warming pockets for compatible warming elements
Comfortable beneath scrubs, uniforms, workwear, and outerwear
Snap-front closure for easy use
Freedom of movement without bulky insulation
Machine washable (remove warming elements before laundering)
Designed for Healthcare Professionals
Operating rooms, imaging departments, emergency departments, laboratories, and clinical environments are often maintained at temperatures that can be uncomfortable during long shifts.
REFLECT™ helps healthcare professionals stay warm and comfortable while maintaining full mobility, helping support focus, dexterity, and endurance throughout demanding workdays.
Designed for Raynaud's Sufferers
For individuals living with Raynaud's phenomenon, maintaining core warmth can be an important part of managing cold sensitivity.
REFLECT™ is designed to help reduce overall heat loss by reflecting body heat back toward the wearer. By helping preserve warmth around the body's core, REFLECT™ may assist users in remaining more comfortable in cold offices, hospitals, retail environments, air-conditioned spaces, and outdoor winter conditions.
Many users appreciate REFLECT™ because it:
Helps support core warmth without heavy layers
Fits comfortably beneath everyday clothing
Provides discreet thermal support throughout the day
Can be paired with compatible warming elements for additional warmth
Offers warmth without sacrificing mobility or comfort
REFLECT™ is not a medical device and is not intended to diagnose, treat, cure, or prevent any disease or medical condition.
Warmth Without Bulk.
Whether you're working a twelve-hour shift, navigating winter weather, managing cold sensitivity, or simply looking for a smarter way to stay warm, HEATJAC REFLECT™ helps keep your body's warmth where it belongs—close to you.
thermal performance
redefined
-
Developed by an anesthesiologist and inventor to solve real-world thermal comfort challenges in demanding professional environments.
-
A proprietary wearable platform engineered to deliver thermal performance without compromising mobility, comfort, or fit.
-
Designed to support long-duration warming solutions for cold environments, extended shifts, and outdoor conditions.
-
Compatible with cooling configurations that help manage heat and improve comfort in warm or high-temperature environments.
-
Worn discreetly beneath uniforms, workwear, tactical gear, scrubs, or outdoor apparel without added bulk.
-
Built for healthcare, industrial, tactical, commercial, and recreational applications where comfort can impact performance.
Meet the Founder
HEATJAC wasn't invented in the outdoor industry. It was born in medicine.
HEATJAC was founded by Dr. Mark Silverberg, DDS, MD, a physician, anesthesiologist, inventor, and healthcare innovator whose career focused on patient care, procedural excellence, and solving real-world challenges in demanding environments.
After decades in operating rooms where temperature and comfort directly impact performance, recovery, and outcomes, Dr. Silverberg recognized a problem that traditional apparel and thermal solutions had never solved. The result was HEATJAC—a patented wearable thermal performance system designed to help users maintain comfort without bulk, restriction, or compromise. Originally developed to support warmth in cold operating room environments, the platform's versatile architecture also enables cooling configurations for applications where heat management is equally important.
Today, that same physician-driven innovation extends beyond healthcare into industrial, tactical, commercial, outdoor, and consumer applications, bringing medical-grade thermal management to the people who depend on comfort, focus, and performance in demanding environments. Whether supporting warmth in cold conditions or cooling in challenging heat, HEATJAC was designed around a simple principle: helping people perform at their best when temperature matters.
Because when a thermal solution is developed by a doctor instead of a clothing company, it starts from a fundamentally different place.
HEATJAC was born in healthcare—an environment where precision, performance, and reliability matter every day. That same philosophy now extends across professional, industrial, and outdoor applications, delivering thermal solutions designed to help people stay focused, comfortable, and prepared when conditions are at their toughest.
trusted where failure isn’t an option.
need to order larger quantities?
Contact us for volume discounts.
