Silk is a natural protein fiber, some forms of which can be woven into textiles. The protein fiber of silk is composed mainly of fibroin and is produced by certain insect larvae to form cocoons. The best-known silk is obtained from the cocoons of the larvae of the mulberry silkworm Bombyx mori reared in captivity (sericulture). The shimmering appearance of silk is due to the triangular prism-like structure of the silk fibre, which allows silk cloth to refract incoming light at different angles, thus producing different colors.

Aerogel is a synthetic porous ultralight material derived from a gel, in which the liquid component for the gel has been replaced with a gas. The result is a solid with extremely low density and low thermal conductivity. Nicknames include frozen smoke, solid smoke, solid air, solid cloud, blue smoke owing to its translucent nature and the way light scatters in the material. It feels like fragile expanded polystyrene to the touch. Aerogels can be made from a variety of chemical compounds.

This guy ♥♥♥♥♥ hard.

📂Documents
└📁CS:GO
└📁Skills
└⚠️ This folder is empty
└📁Cheats
└ ⚠️ AimBot.exe
└ ⚠️ SpinBot.exe
└ ⚠️ TriggerBot.exe
└ ⚠️ BhopScript.exe
└ ⚠️ WallHack.exe
└ ⚠️ NoFlash.exe

A textbook or coursebook (UK English) is a manual of instruction in any branch of study. Textbooks are produced according to the demands of educational institutions. Schoolbooks are textbooks and other books used in schools.[1][2] Although most textbooks aren't only published in printed format, many are now available as online electronic books.

A T-shirt (or tee shirt, or tee) is a style of fabric shirt, named after the T shape of the body and sleeves. It is normally associated with short sleeves, a round neck line known as a crew neck, with no collar.

Typically made of cotton fibers knitted in a jersey stitch, they have a distinctive soft texture compared to woven shirts. The majority of modern versions have a body made from a continuously woven tube, on a circular loom, so that the torso has no side seams. The manufacture of T-shirts has become highly automated, and may include fabric cutting by laser or water jet.

The T-shirt evolved from undergarments used in the 19th century, through cutting the one-piece union suit underwear into separate top and bottom garments, with the top long enough to tuck under the waistband of the bottoms. With and without buttons, they were adopted by miners and stevedores during the late 19th century as a convenient covering for hot environments.