PU

PU or Poly-Urethane.
Poly-Urethane is Synthetic (plastic) material with minute bubbles or cells and a skin like surface. Used for upper materials, and in a different form for midsoles or padding foam. PU (upper material
PU (short for polyurethane) upper materials usually use a thin layer of PU foam with a non-woven or fabric backing for reinforcement and strength. PU can come in thousands of different colors and textures.

Learn more about making shoes:

Do you want to learn how big brands make shoes?  Now you can!  How Shoes are Made will show you how modern shoes come to life! More than just a tour through a sneaker factory and more than your average shoe making book!  This is the perfect Shoe design a handbook for footwear designers.  From drawing shoe designs to sample development and footwear manufacturing, you will learn how it is all done. Written by veteran shoemaking pros, How Shoes are Made will give you a look inside the REAL world of shoe design, development, and mass production. 220 pages with over 400 color photos and drawings. 26 chapters explaining shoe design, footwear pattern making, sample development, footwear materials selection, upper stitching, outsole and tooling design, shoe lasts, shoe costing, quality inspections, pattern making and much more!  A must-read for young shoe designers, sneakerheads, or any footwear fanatic! Secure payments Visa, MasterCard & PayPal. Over 3500 copies sold! Read in over 60 countries!
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Table of Contents:

The Design Process, Shoe Development, Shoe Patterns, Shoe Specifications, Outsole Tooling, Development Process, Pre-Production, Material Preparation, Stitching Operations, Rubber Pressing, EVA Forming, The Assembly Line, The Shoe Last, Footwear Costing, Importing Shoes, Shoe Logo Design, Leather for Shoes, Textiles for Shoes ,Synthetics for Shoes,  Foam for Shoes, Know Your Footbeds, Material Suppliers, Shoe Designers Tools, Jobs in the Shoe Trade ,Quality Control, Starting a Shoe Company, Life at a Shoe Factory, Shoe Making Dictionary

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