1. The fabric is made of 20D ultra-thin cicada wing fabric and has undergone high-tech nano-triple protection treatment: waterproof, stain-resistant, and downproof; it uses four-way stretch fabric, which has good stretch and resilience, adapting to the needs of body movement in sports scenarios, making it more flexible and comfortable to wear. 
2. The lining uses 400T (400-strand) ultra-soft washed lining fabric, which is breathable and does not shrink, has a soft and smooth feel, and has a better downproof effect than ordinary downproof lining fabric. 
3. Triple down-locking sewing process: We use imported Japanese No. 7 round-head needles (small needle eye) for the first layer of down-locking, specially customized three-strand high-count waxed thread (with diamond tension) for the second layer of down-locking, and compartment filling for the third layer of down-locking.