SUNHOT™ Thermal Fleece Technical White Paper A New Generation of High-Efficiency Thermal Fleece Material Redefining Warmth Through Fiber Structure Innovation

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  • 2026-10-13 at 5:11 pm #12394
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      01 Executive Summary

      From Traditional Fleece to Advanced Thermal Management Materials

      For decades, fleece fabrics have played an essential role in outdoor apparel systems.

      Traditional fleece became popular because of its:

      • Soft hand feeling;

      • Lightweight construction;

      • Easy-care performance;

      • Reliable warmth.

      However, the next generation of outdoor apparel requires more than basic insulation.

      Modern consumers and professional users expect:

      • Higher warmth efficiency;

      • Lower garment weight;

      • Better mobility;

      • Comfortable everyday wear;

      • Reliable performance in different environments.

      The challenge for textile developers is clear:

      How can we achieve higher thermal efficiency without simply increasing fabric thickness and weight?

      Sunshinetex developed SUNHOT™ Thermal Fleece based on advanced fiber structure engineering.

      Instead of relying only on increasing fabric thickness, SUNHOT focuses on improving the efficiency of trapped air insulation and thermal resistance.

      The result is a new functional fleece solution designed for outdoor apparel, urban outdoor clothing, sportswear and winter lifestyle products.

      02 Understanding Thermal Performance

      Why CLO Value Matters in Professional Material Selection

      When selecting insulation materials, consumers often judge warmth by thickness.

      However, professional apparel developers evaluate insulation through measurable thermal performance.

      One of the internationally recognized indicators is:

      CLO Value

      CLO represents the thermal insulation capability of clothing materials.

      A higher CLO value indicates stronger resistance against heat loss under testing conditions.

      For material developers, CLO provides a more scientific comparison method than:

      • Fabric thickness;

      • Weight alone;

      • Surface touch sensation.

      Professional insulation materials including fleece, synthetic insulation and down alternatives are often evaluated through thermal resistance testing.

      03 SUNHOT™ Thermal Performance Data

      SUNHOT™ Thermal Fleece was tested for thermal transfer performance according to:

      GB/T 35762-2017 Flat Plate Method

      Test sample:

      • Product: Taiji Carbon Double-Sided Sherpa Fleece

      • Composition: 100% Polyester

       

      Testing organization:

      United Testing Services (Jiangsu) Co., Ltd.

       

      Thermal Performance Results

      Test Item Result
      Thermal Resistance 0.193 m²·K/W
      Thermal Retention Rate 67.1%
      Heat Transfer Coefficient 5.17 W/(m²·K)
      CLO Value 1.25 CLO

       

      The test results demonstrate SUNHOT™ Thermal Fleece’s capability as a high-efficiency insulation fleece material.

      04 Positioning in the Thermal Material Landscape

      Comparative Understanding of Insulation Technologies

      Different insulation materials achieve warmth through different mechanisms.

      Material Category Main Insulation Principle Typical Advantage
      Cotton Fiber bulk insulation Natural availability
      Wool Natural fiber air trapping Moisture comfort
      Traditional Fleece Surface pile air retention Softness and versatility
      High Loft Fleece Increased loft structure Higher warmth-to-weight ratio
      Synthetic Insulation Microfiber air trapping Lightweight warmth
      Down High fill power structure Excellent warmth efficiency
      SUNHOT™ Thermal Fleece Engineered fiber structure + thermal insulation Balanced warmth, comfort and manufacturability

      05 Why SUNHOT™ Creates New Possibilities for Fleece Applications

      1. High Warmth Efficiency

      The biggest limitation of conventional winter apparel is the relationship between:

      Warmth ↔ Weight ↔ Thickness

      Increasing thickness can improve insulation, but may reduce:

      • Freedom of movement;

      • Product aesthetics;

      • Wearing comfort.

      SUNHOT™ focuses on improving thermal efficiency through fiber engineering.

      This allows brands to explore:

      • Lightweight winter jackets;

      • Functional fleece layers;

      • Urban outdoor collections;

      • Comfortable everyday insulation garments.

      2. Fleece Platform Advantage

      Compared with some filling-based insulation systems, fleece has natural manufacturing advantages.

      SUNHOT™ maintains the advantages of knitted fleece:

      Flexible garment construction

      Suitable for:

      • Cut and sew production;

      • Sportswear manufacturing;

      • Casual apparel development.

      Comfortable wearing experience

      Suitable for:

      • Next-to-skin layers;

      • Mid layers;

      • Lifestyle apparel.

      Easy product integration

      Can be developed into:

      • Jackets;

      • Hoodies;

      • Outdoor tops;

      • Travel apparel.

      3. Designed for Outdoor + Urban Lifestyle

      The outdoor apparel market is evolving.

      Consumers are no longer buying only professional expedition products.

      They are looking for products that combine:

      Outdoor performance + Daily comfort.

      SUNHOT™ fits this emerging market direction.

      Applications include:

      Outdoor Performance

      • Hiking jackets;

      • Trekking apparel;

      • Camping clothing;

      • Outdoor mid layers.

      Urban Outdoor

      • City jackets;

      • Functional hoodies;

      • Winter casual wear.

      Lifestyle Textile

      • Homewear;

      • Warm blankets;

      • Winter accessories.

      06 SUNHOT™ vs Traditional Fleece Development Logic

      Traditional Approach

      Increase thickness → Increase warmth

      Limitations:

      • Heavier garment;

      • Reduced flexibility;

      • Bulkier appearance.

      SUNHOT™ Approach

      Optimize fiber structure → Improve thermal efficiency

      Advantages:

      • Better warmth-to-weight balance;

      • Comfortable hand feel;

      • Flexible product design.

      07 Product Development Value for Brands

      For apparel brands, choosing a fabric is not only about technical performance.

      It is also about:

      Product Differentiation

      A unique insulation material creates stronger market positioning.

      SUNHOT™ allows brands to develop:

      • Premium fleece collections;

      • Functional winter apparel;

      • Outdoor lifestyle products.

      Supply Chain Efficiency

      Fleece structures provide mature manufacturing compatibility.

      Benefits include:

      • Easier production integration;

      • Flexible garment design;

      • Stable manufacturing process.

      Commercial Product Potential

      SUNHOT™ provides a balance between:

      Performance

      •  

      Comfort

      •  

      Manufacturability

      •  

      Consumer Appeal

      08 Quality & Testing Assurance

      SUNHOT™ thermal fleece has completed professional thermal performance testing.

      The test report confirms:

      • Sample information;

      • Testing methodology;

      • Thermal resistance results;

      • CLO performance data.

       

      This provides technical reference for customers during:

      • Product development;

      • Material evaluation;

      • Supply chain approval.

      09 Why Choose Sunshinetex?

      Sunshinetex focuses on advanced functional textile development.

      We support global partners with:

      Material Innovation

      Developing new fiber-based solutions for changing market needs.

      Application Support

      Helping customers select suitable structures for different products.

      Manufacturing Capability

      Supporting commercial-scale textile production.

      Customized Development

      Working with brands on customized material requirements.

      Conclusion

      The Future of Warmth Is Not Simply Thicker.

      It Is Smarter Thermal Efficiency.

      The next generation of winter apparel requires materials that balance:

      • Warmth;

      • Weight;

      • Comfort;

      • Design flexibility.

      With a tested CLO value of 1.25, SUNHOT™ Thermal Fleece demonstrates strong potential as a high-efficiency fleece solution for modern outdoor and lifestyle apparel.

      Sunshinetex is creating a new approach to fleece:

      Not only warmer materials,

      but smarter thermal comfort solutions.

      SUNHOT™ Thermal Fleece

      Engineered Warmth. Designed for Future Apparel.

      Sunshinetex

      Official Contact Information
      – Kunshan Huayang New Materials Co., Ltd.
      – No. 417 Sanxiang Road, Kunshan City, Suzhou, Jiangsu Province, P.R.China
      – General Manager of Foreign Trade
         zhangguoyan@sunshinetex.com
      – Website:http://chichengcorp.webk.testwebsite.cn/

      http://chichengcorp.webk.testwebsite.cn/
      sunshinetex

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