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Polyurethane is a type of polymer, or large molecule composed of repeated subunits, that is widely used in many industrial and consumer products due to its versatility and durability. It can be rigid or flexible, and is typically used in various items including foam mattresses, insulation, adhesives, sealants, paint, and varnishes. The material is generally resistant to weather, oils, and solvents, which makes it suitable for many applications. The properties of a polyurethane can vary greatly depending on how it is produced, and can include qualities like elasticity, transparency, and resistance to abrasion, heat, and electricity.

A bachelor party (in the United States and sometimes in Canada), also known as a stag weekend, stag do or stag party (in the United Kingdom, Commonwealth countries, and Ireland), or a bucks night (in Australia), is a party held/arranged by the man who is shortly to enter marriage.
A stag night is usually planned by the grooms friend or brother, occasionally with the assistance of a bachelor party planning company.
The first references to Western stag nights in the Oxford English Dictionary date to the 19th century. Traditionally, stag nights involved a black tie banquet hosted by the father of the groom that included a toast in honour of the groom and bride. Since the 1980s, some bachelor parties in the United States have involved vacationing to a foreign destination, or have featured female company such as strippers or topless waitresses.

(with on) To approach in a determined manner.

The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called visible light or simply light. A typical human eye will respond to wavelengths from about 380 to about 750 nanometers. In terms of frequency, this corresponds to a band in the vicinity of 400–790 terahertz. These boundaries are not sharply defined and may vary per individual. Under optimal conditions these limits of human perception can extend to 310 nm (ultraviolet) and 1100 nm (near infrared). The optical spectrum is sometimes considered to be the same as the visible spectrum, but some authors define the term more broadly, to include the ultraviolet and infrared parts of the electromagnetic spectrum as well.The spectrum does not contain all the colors that the human visual system can distinguish. Unsaturated colors such as pink, or purple variations like magenta, for example, are absent because they can only be made from a mix of multiple wavelengths. Colors containing only one wavelength are also called pure colors or spectral colors.Visible wavelengths pass largely unattenuated through the Earths atmosphere via the optical window region of the electromagnetic spectrum. An example of this phenomenon is when clean air scatters blue light more than red light, and so the midday sky appears blue (apart from the area around the sun which appears white because the light is not scattered as much). The optical window is also referred to as the visible window because it overlaps the human visible response spectrum. The near infrared (NIR) window lies just out of the human vision, as well as the medium wavelength infrared (MWIR) window, and the long-wavelength or far-infrared (LWIR or FIR) window, although other animals may perceive them.

Giriama is one of the nine ethnic groups that make up the Mijikenda (which literally translates to nine towns) in Kenya. They are primarily located in the coastal region of the country. The Giriama are known for their traditional dances, vibrant ceremonies, spirit possession cults, and skilled craftsmanship in pottery, basketry, and house construction.