Neoprene is a covering that covers the entire dumbell that results in the dumbbell having an anti slip grip allowing for added safety and comfort.
Coozies are used to keep liquids like beer, wine or soft drinks cold. They are usually made from foam or neoprene or other materials that don't conduct heat.
Conductors
No, the Troy VTX Neoprene / Vinyl Dumbbell Rack does not come in any other colors than black.
Better for what? Usually one material is better for some things, other materials for other things. The special feature of constantan is its low temperature coefficient for electrical resistance.
Vinyl windows last longer and sound better when being raised or lowered.
liver
I wouldn't say it's 'better', but if it were to be, then it would properly be because of it's fine, smooth touch and highly made quality OS material. :)
Castles went out of fashion because scientist found better and more resistant materials to make other buildings out of.
Sometimes composites are better than the traditional material because they enhance the properties of the traditional materials. e.g. Plastic has useful strength and ridgity, it is lightweight and is good at electrical insulation but by adding other materials you can create fibre-reinforced polymers
The rack holds 10 standard sized dumbbells, or 5 pairs of dumbbells. Maxicam makes many other dumbbell racks with similar part numbers that hold other numbers of dumbbells. These other part numbers have a letter after the '3006'.
The international governing body for swimming sports has recently issued new rules for swimwear in competition. The suits must be made of textile materials and cannot be neoprene or any other rubberized material. They cannot go above the navel or below the knee and cannot have any fastening devices outside of a waist tie.
It looks like a Large Neoprene Pouch for a Samsung Convoy 2 at $7 but there are other phones out there and other fittings. I'd say that price is about right for all cheap cases.