Wetsuits are made of closed-cell, foam neoprene, a synthetic rubber that contains small bubbles of nitrogen gas when made for use as wetsuit material ( neoprene as a plastic may be manufactured without foaming, and is made in that fashion for many other applications where insulating qualities are not important ).

Terry, a future apparel designer who was working for the wetsuit manufacturing company Aleeda, acquired a large amount of spare rubber and neoprene and fashioned together matching helmets and rashguards for the band members.

While a wetsuit of neoprene rubber and divers ' drysuits provide a degree of flotation, they are not formally considered by regulatory agencies as approved lifesaving devices or as PFDs, in most maritime countries.

Weever stings have been known to penetrate wet suit boots even through a rubber sole ( if thin ) and it is recommended that bathers and surfers wear sandals, " jelly shoes " or wetsuit boots with a relatively hard sole and avoid sitting or " rolling " in the shallows.

Because rubber does not dissolve easily, the material is finely divided by shredding prior to its immersion.

In most models, a gasket or sealing ring, made from either rubber or silicone, forms a gas-tight seal that does not allow air or steam to escape between the lid and pan ; more expensive models feature a metal-to-metal seal.

This, usually combined with a rubber pinch roller, ensures that the tape speed does not fluctuate.

A rubber lip-type seal ensures that excessive amounts of oil are not drawn in from the crankcase on the induction stroke and that exhaust gas does not enter the crankcase on the exhaust stroke.

The adhesive used is a high quality synthetic rubber which leaves little or no residue when removed and typically does no harm to whatever the tape is applied to.

A port ( often referred to by brand names such as Port-a-Cath or MediPort ) is a central venous line that does not have an external connector ; instead, it has a small reservoir that is covered with silicone rubber and is implanted under the skin.

Elastomers and shape memory metals such as Nitinol exhibit large elastic deformation ranges, as does rubber.

Rubber does not produce a constant power output ; when fully wound a rubber motor produces its maximum torque, but this drops rapidly at first before ' plateau-ing ', finally declining again, after which the propeller stops.

The composite behavior is analogous to a nylon stocking, whose rubber band does the role of elastin as the nylon does the role of collagen.

This makes membrane dry suits easy to put on and get off, provides a great range of motion for the wearer, and makes them comfortable to wear for long periods, as the wearer does not have to pull against rubber elasticity.

The movement of a such a large bubble to the legs can be a problem for a number of reasons: It balloons the legs, and it may inflate thin rubber booties enough to cause fins to pop off ; a diver without fins has more restricted ability to move and become upright, and also loses the ability to kick downward to maintain depth, so that the bubble expansion problem does not grow worse.

Many inflatables are made of material that does not stretch upon inflation ; a notable exception of this is the balloon, whose rubber stretches greatly when inflated.

It replaced the earlier machine's ZX81-like case with a ZX Spectrum-like case ( in Silver ), the same ZX Spectrum rubber keyboard, a custom ULA ( it does not have the Ferranti ULA ) and increased the onboard RAM to 16 KB.

Normally an underused circuit becomes faster over the weekend as the track surface gathers more rubber residue ; however, with the Hungaroring this generally does not happen because the track can get dusty so quickly.

While Hevea-derived rubber contains proteins that can cause severe allergic reactions in a few people, guayule does not.

He is described as " the kind of mildly objectionable person who engendered an irresistible urge in any right-thinking person to poor goo into his hair and hit him with a rubber yak ," and the abbot does just that at any and every opportunity.

Because of this relationship, the rubber plant does not produce highly colourful or fragrant flowers to attract other pollinators.

The clear-coated sand used has obvious benefits over its predecessor ( ground-up black rubber ) in that it does not absorb as much heat, does not compact over time, and does not migrate during use.

Latex rubber has significant drawbacks in these applications: it is easily damaged by rough handling and by oils, creams, and ointments ; it does not allow air to ventilate ; it also makes a characteristic rustling noise when moved, which limits its use in situations where discretion is necessary.

* pressureless ball: Special type of tennis ball that does not have a core of pressurized air as standard balls do, but rather has a core made of solid rubber, or a core filled tightly with micro-particles.

Additionally, silicone grease does not swell or soften the rubber, which can be a problem with hydrocarbon based greases.

Materials such as PVC, leather and rubber latex, are amongst the most common to immediately take on the signifying work of fetish attire.

The best rubber trees in the world grew in the Amazon, and thousands of rubber tappers began to work the plantations.

Arthur Conan Doyle also criticised the ' rubber regime ' in his 1908 work The Crime of the Congo, written to aid the work of the Congo Reform Association.

His work makes much play with the contrast between pale skin and black restraints and latex garments, and with the use of shading to imply shiny rubber textures and musculature.

However, Alexander was devoted to his post and took his work seriously, although he rarely made the effort to read the official documents that he rubber stamped.

Osmium is very difficult to work with, but he developed a new method which mixed osmium oxide powder with rubber or sugar into a paste, which is then squeezed through a nozzle and fired.

The red kangaroo's legs work much like a rubber band.

Nieuwland's research was focused on acetylene chemistry and during the course of his work he produced divinyl acetylene, a jelly that firms into an elastic compound similar to rubber when passed over sulfur dichloride.

Although Ray Johnson ( 1927 – 1995 ), considered by many as the founding father of Mail Art, never joined Fluxus, his work is aesthetically close to that of the Fluxus group ... Johnson's work consists primarily of letters, often with the addition of doodles, drawings and rubber stamped messages.

The movement of population became particularly active during the prolonged drought of the northeastern interior, from 1877 to 1880, expelling hundreds of Cearenses, who headed for the rubber plantations in search of work.

Likewise, sound and vibration isolation is improved ( at the expense of handling ), in production automobiles, by the use of rubber bushings between the frame and suspension, by any flexibility in the frame or body work, and by the flexibility of the seats.

The print from the carved rubber stamp is viewed as work of art on its own, or one or more stamps are used to embellish a work of art with other components.

Steel tracks and payload capacity allowed these machines to work in terrain that would typically cause the poorer quality rubber tires that existed before the mid 1930s to spin uselessly, or shred completely.

Some commercial divers order their suits without boots and install rubber work boots such as those used by miners or firefighters.

The Thomas Lawrence brickworks on the north side of the town was famous for ' red rubber ' bricks to be found in the Royal Albert Hall and Westminster Cathedral, and in restoration work at 10 Downing Street and Hampton Court Palace.

Materials that machinists work with occasionally are plastics, rubber, glass, and wood products.

Many Vietnamese were recruited to work on rubber plantations and later immigrants played key roles in the colonial economy as fisherman and businessmen.

While there are other compounds, such as silicone and urethane that are stronger and last longer, foam rubber is used because it is much easier to work with.

From 1967 to 1977 Bahro worked in various companies in the rubber and plastics industry in work organization.

When divers must work in hazardous environments such as sewage or dangerous chemicals, a helmet ( usually of the free-flow type or using a series exhaust valve system ) is sealed to a special drysuit ( commonly made of a fabric with a smooth vulcanised rubber outer surface ) to completely isolate and protect the diver.