how to stretch a leather jacket

{"cid":"91223232","title":"Customizable Unisex Varsity Jacket Mens Streetwear Stretch OEM Service","imgUrl":"https:\/\/img.chinax.com\/nimg\/ad\/e2\/f8a28bc9557b31fa5365e8eb16c8-200x200-1.jpg","attrs":{"Price":"CN\u00a5214.86\/pieces 50-199 pieces","Brand Name":"Mei Yue","Model Number":"HJ-231012","Minimum Order Quantity":"50 pieces","Place of Origin":"Guangdong, China","Processing Type":"Double Face Leather","Feature":"Quick Dry, Waterproof, Breathable, Windproof","Collar":"O-Neck","Supply Type":"OEM service","Printing Methods":"None","Material":"Leather\/Wool Varsity Jacket","Technics":"embroidered","Gender":"Men","Season":"Autumn","Clothing Length":"Regular","Sleeve Style":"Regular","Thickness":"Thick","Type":"Regular","Fabric Weight":"80 grams","Decoration":"Vintage","7 days sample order lead time":"Support","Weaving method":"woven","Seamless Fusing":"Yes","Needle detection":"Yes","Item Type":"Varsity Jacket","Pattern Type":"Letter","Style":"Casual"}}

{"cid":"91186287","title":"58'' Stretch Weft Knitted Micro Suede Polyester Fabric","imgUrl":"https:\/\/img.chinax.com\/nimg\/c5\/bb\/732884244c8639586e783998d347-200x200-1.jpg","attrs":{"Price":"Negotiated","Brand Name":"Fengcai","Model Number":"FC2021210","Minimum Order Quantity":"1000 yards per colour","Delivery Time":"20 days","Certification":"EN \/ Oeko-Tex Standard 100 \/ SGS \/ ROHS","Place of Origin":"CHINA","Payment Terms":"L\/C, D\/A, D\/P, T\/T, Western Union, MoneyGram","Supply Ability":"60000 yards per day","Packaging Details":"1.Standard packing: inner is plastic bag and outer woven bag; 2. Non-standard packing: according to your requirement; 3. Load 9,000kgs for a 20\"GP container, and about 21,000kgs for a 40\"HQ.","Name":"Scuba Suede Fabric","Composition":"95% Polyester 5% Spandex","Knitted Type":"Weft","Sample":"Offerd","Width":"58''","Weight":"385","Style":"One side brushed","Pattern":"Plain dyed","Yarn Count":"Inquiry us","Use":"Garment,Jacket,Bag"}}