Background. The increasing emission of greenhouse gases has evoked the human being to save the ozone layer and minimize the risk of ultraviolet radiation (UVR). Various fabric structures have been explored to achieve desired ultraviolet protection factor (UPF) in various situations. Objective. In this study, the effect of various filament configurations like twisted, flat, intermingled, and textured in multifilament yarns on fabric in different combinations is assessed in order to engineer a fabric of better ultraviolet protection factor (UPF). Methods. In order to engineer a fabric having optimum UV protection with sufficient comfort level in multifilament woven fabrics, four different yarn configurations, intermingled, textured, twisted, and flat, were used to develop twelve different fabric samples. The most UV absorbing and most demanding fibre polyethylene terephthalate (PET) was considered in different filament configuration. Results. The combinations of intermingled warp with flat, intermingled, and textured weft provided excellent UVR protection comparatively at about 22.5？mg/cm2 fabric areal density. The presence of twisted yarn reduced the UV protection due to enhanced openness in fabric structure. Conclusion. The appropriate combination of warp and weft threads of different configuration should be selected judiciously in order to extract maximum UV protection and wear comfort attributes in multifilament woven PET fabrics. 1. Introduction Prolong and frequent exposure of human being against sun causes different dermatological problems [1]. The short-term exposure to ultraviolet radiation (UVR) causes sunburn and in medical science it is erythema [2, 3]. Prolong sunburn leads to photoageing of skin and results in terms of both nonmelanoma and melanoma skin cancer [4]. The specific band of UV radiation (100–400？nm) can be classified into three groups on the basis of wavelength. The UVA region of light belongs to span of wavelength 315–400？nm while the UVB radiation comes in the range of 280–315？nm [5]. The region 100–280？nm is extremely dangerous and belongs to UVC radiation. Divinely, nature has stratospheric ozone layer in atmosphere to absorb UVB and UVC and to block it to reach on earth surface [6]. The intensity of UVR is the highest in Australia and some part of eastern and southern Europe, so protection of adolescents and children (skin thickness is very less) than adults and outdoor workers is very essential [7]. When UVR strikes on textile surfaces, part of it can be transmitted, absorbed, and reflected by the textiles as shown in
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