Trend Observation

For AW26, stretch fabric is no longer a simple matter of "adding spandex." From raw materials to weaving, a technical race around sustainability, comfort, and multifunctionality is unfolding. Spandex blends are transitioning from conventional petroleum-based to bio-based polyurethane, while low-temperature setting significantly reduces energy consumption. Stretch jacquards combine three-dimensional textures with directional elasticity through high-gauge circular knitting and warp knitting, upgrading both visual and tactile qualities. In sportswear and intimate apparel, 4-way stretch achieves seamless fit and lasting recovery via double-face structures and new Lycra formulations, becoming a ticket to the high-end market.

**Spandex Blends: Bio-based and Low-Temperature Setting**

Traditional spandex blends mainly use petroleum-based PTMG. In AW26, bio-based spandex (e.g., corn-based PDO) shares rise noticeably. These fibers maintain elasticity while cutting carbon footprint by about 30%. More critically, low-temperature setting allows spandex to complete molecular chain reorganization at 130°C, saving over 25% energy compared to the traditional 180°C process, and reducing thermal damage to natural fibers like cotton and wool. In blends, 5%-12% spandex becomes the golden range for sportswear, balancing recovery and cost.

**Stretch Jacquards: Symbiosis of Texture and Function**

Stretch jacquards say goodbye to a "decoration-only" role. In AW26, double-face jacquards and jacquard warp knits present geometric, floral, or abstract surfaces on the face, while the back forms directional elastic zones through spandex and nylon interlooping. For example, high-stretch zones at knees and elbows, low-stretch support zones at waist and abdomen, enabling "one piece, multiple functions." Moreover, yarn-dyed stretch jacquards use solution-dyed yarns to reduce dyeing steps, meeting sustainability demands.

**4-Way Stretch: Seamless Revolution in Sportswear and Intimates**

In sportswear, 4-way stretch evolves toward a "second skin." Through double-face weft knitting and high-density spandex networks, fabrics achieve over 150% stretch in both directions and over 95% recovery. In intimates, 4-way stretch combined with microfiber nylon balances seamless comfort, breathability, and shaping. In AW26, one-piece circular knitting reduces seams, enhancing comfort and cutting production waste.

Industry Impact

The technological upgrade of stretch fabrics is reshaping the supply chain. Upstream, capacity expansion of bio-based spandex and recycled nylon drives costs down gradually. By 2026, bio-based spandex is expected to be 15%-20% more expensive than conventional, but brand premiums can cover it. Midstream weavers need to invest in high-gauge circular knitting and warp knitting machines and master low-temperature setting, or face order losses. Downstream brands increasingly favor suppliers with integrated "yarn-weaving-setting" capabilities to shorten lead times and ensure elastic consistency.

The boundary between sportswear and intimate apparel is blurring. Demand for 4-way stretch in sports bras, yoga pants, and shapewear surges, pushing mills to develop composite functions like moisture management, antibacterial, and UV protection. In exports, the EU Carbon Border Adjustment Mechanism (CBAM) makes low-carbon spandex blends a plus for EU market access. Meanwhile, Southeast Asian factories catching up in stretch jacquards exert price pressure on Chinese suppliers, making differentiation and quick response key.

Practical Advice

For Buyers - Prioritize bio-based spandex blend fabrics, calculate full life-cycle carbon footprint, and prepare for EU market access. - Require suppliers to provide low-temperature setting parameters to ensure hand feel and strength of natural fiber blends. - In sportswear and intimate orders, specify 4-way stretch rate (≥150%) and recovery (≥95%), and add elasticity retention tests after multiple washes.

For Designers - Use directional elastic zones in stretch jacquards to add mobility at joints and support at core areas. - Try combining 4-way stretch with seamless one-piece knitting to reduce seams and create minimalist, fluid silhouettes. - Note the color fastness limitations of bio-based spandex; prioritize solution dyeing or low-temperature dyeing to avoid thermal damage.

For Factories - Invest in high-gauge circular knitting machines (28G+) and jacquard warp knitting machines to improve fineness and efficiency of stretch jacquards. - Establish standardized low-temperature setting procedures, monitor temperature and tension to ensure batch-to-batch elastic consistency. - Co-develop custom blend ratios with yarn suppliers to lock in differentiation.

For Exporters - For EU clients, proactively provide carbon footprint reports and bio-based content certificates to strengthen green selling points. - To counter Southeast Asian competition, focus on small-batch, quick-response stretch jacquard orders, shortening lead time to within 15 days. - Watch US demand for seamless intimates and promote 4-way stretch with microfiber nylon combinations.