Slip is a woman's undergarment worn beneath dresses or skirts. Full slip hangs from shoulders to breast, waist slip from waistband. Helps dress hang properly and protects skin from chafing. Provides warmth and prevents show-through of intimate undergarments
Dress changed gradually from 400 to 1100 AD. Roman and invading peoples combined their costumes. Most people wore simple T-shaped tunics made by themselves. Clothing was expensive for most, except the wealthy
Both are synthetic fabrics made from petroleum and water. Polyester was invented in 1941, polyamide in 1938. Polyester fibers are tightly woven, polyamide has different weave pattern
Selvage is a self-finished edge preventing fabric unraveling and fraying. In woven fabric, created by weft thread looping back at end of each row. In knitted fabrics, unfinished yet structurally sound edges. Term "selvage" has been used since 16th century
World's oldest shirt is Egyptian linen from 3000 BC. Originally men's undergarment, became general upper-body garment. Women began wearing shirts in 1860 with Garibaldi shirt. Hannah Montague invented detachable collar in 1827
Spandex was invented in 1958 by DuPont chemist Joseph Shivers. It's a polyether-polyurea copolymer with exceptional elasticity. Mainly composed of polyurea derived from diol and diisocyanate reactions. Cannot be melt-processed due to polymer degradation