Functionality -Strength - How will a product cope with being worn and washed, its will be subjected to a lot of friction through uses. Are the fibres and structure of the fabric suitable for the intended wear., Functionality - Absorbency - Does the product need the fabric to absorb or repel moisture? A towel needs to absorb moisture to do its job, a rain coat needs to keep your dry. , Functionality - Warmth - Does the fabric need to insulate the wearer by trapping air? Does the fabric have the correct structure/properties that does this?, Function -Windproof - Closely woven fabrics with laminated layers such as Gore-Tex do not allow air to pass through them to help insulate from the cold., Function - Catches fire and burns - An important consideration when choosing children's nightwear and soft furnishings. Selecting the correct fibres/fabrics for products is essential., Function - resists chemical attack - Chemicals in laundry detergents such as strong alkalis and chlorine found in swimming pools can weaken fabrics over time. Perspiration can damage sile  , Function - resists biological attack - Moths and mould (mildew) can spoil fabrics. Moths lay eggs on wool based fabric and their larvae will leave holes, mildew grows on cellulose based fibres such as cotton when they are kept in damp condition and is very difficult to remove., Aesthetics - fabric finishes - Fabrics can be given different textures in many different ways depending on the fibre and yarn used and the way the fabric is constructed. The choice of surface finish and feel is a personal thing., Environmental factors - Chemical impact - From pesticides to petrochemicals in synthetics yarns can pollute the environments. Chemical dyes can also contain heavy metals that can pollute rivers and land., Environmental factors - Deforestation - Forests can be cut down in order for farmers to grow fibre crops such as cotton, this has in impact on the biodiversity of an area, the water use and retention and soil stability in an area., Environmental factors - Textile waste - Waste is produced not only in the manufacture or garments, but also when consumers dispose of garments. This is a huge problem as many fabrics are not biodegradable and go into landfill., Environmental factors - Components - The manufacture of thread, zips, buttons and other components requires energy and produces emissions from factories. Components often contain polymers which come from crude oil which is unsustainable., Availability - Type of fibre - Some fibres like cashmere are luxury hair fibres which are only available in small quantiles, 5 goats coat wool would be required to make one jumper, when one sheep's fleece could make 5 jumpers , Availability - Trends - The fashion industry is governed by trends like many others, this can lead to colours, patterns and fabrics becoming more difficult to source., Cost - Fibre/weave - The type of fibre and the complexity of the weave can increase the cost of the fabric used for a product. Natural fibres and complex patterns take longer to manufacture compared to synthetic fibres and plain weave. , Cost - Design of garment - The more complex the design of a garment the more processes needed to construct it. This will have an impact due to more time being needed to manufacture the item., Cost - Components - The greater the number of components needed in a garment the higher the cost due to the additional manufacturing processes needed. , Cost - Bulk Buying - Manufactures are able to save money by buying fabrics and components in bulk as and when needed. Due to fashion trends using JIT (just in time system) is important to reduce waste., Social Factors - Clothing choice - Designers of textile products need to consider the needs of specific groups within our multicultural society. Clothing makes a powerful statements about the wearer., Social Factors - Reworking  - In some societies it is traditional to rework fabrics into new items. Patchwork quilt making can be a community activity to celebrate specific events., Social Factors - Employment - How and where textile products are produced can have a huge impact on society in terms of employment opportunities and the impact of manufacturing on the local enviroment , Cultural Factors - Tribes - The cultural groups a person belongs to will affect their clothing choices. Peer group pressure along with the influence of celebrities' will have an impact on choice. , Cultural Factors - Religious - The religion of a group my influence the colour and the type of garment that a group chooses to wear on a day to day basis or for religious ceremonies like weddings and baptisms. , Cultural Factors - Conservative - Some groups may choose to dress outside of the latest fashion trends to avoid drawing undue attention to themselves., Ethical Factors - Animal Welfare - Some people will choose not to wear leather and fur due to concerns about animal welfare and will choose synthetic alternative., Ethical Factors - Fast Fashion - Designers need to consider the negative impact on communities that produce fast and disposable.,

2.1 Selection of materials and components - Textiles specific

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