**1. Introduction**

Bamboo viscose, also known as regenerated bamboo is a regenerated cellulosic fiber. In the last few years in the world market, many products from bamboo fibers have been appearing.

It is marketed as having exceptional properties such as superior comfort and hand yarns of bamboo fibers provide the desirable properties of strength, high moisture absorbency, antimicrobial and antifungal, sheen and smooth close to silk, cashmere, glass fiber high breathability and thermo-regulating properties in textiles and made ups [1]. Shaw [2] currently, regenerated bamboo fibers are used in apparel including undergarments, sportswear, t-shirts and socks, this fiber will not cause skin allergies and its application in sanitary materials such as baby diaper, absorbent pads and sanitary towels. Bamboo fiber has found its way into the fashion world. In their collection, designers often replace more expensive materials like cashmere, silk and glass fiber by their bamboo equivalent [3, 4].

Bamboo has the fastest growth rate among the various types of renewable natural fibers, bamboo fabrics require less dyestuff than cotton fabrics in order to be dyed to the level desired, as they absorb the dyestuff better and faster and show the colour better [5]. The most important aspects of clothing is comfort properties like thermal resistance, air permeability, water vapor and liquid water permeability are critical for the thermal comfort of a clothed body. Comfort plays a vital role in the selection of apparel [12]. Bamboo fiber is more efficient than the cotton fiber as it needs less dying color and raw material to dye the fabric as per the required need. The natural dyeing solution was obtained by from rind of Vempadam Bark (*Ventilago madraspatna*) used for dyeing bamboo fabric. Fastness properties of the dyed sample were studied [6].

Zakrzewski [7] reported that cross-section of the bamboo fiber is covered with micro-holes giving the fabric better moisture absorption and ventilation. According to authoritative testing figures, apparels made from bamboo fibers are 1–2 degrees lower than normal apparels in hot summer. Apparel made from bamboo fiber is crowned as *air conditioning dress* [8].

Bamboo fibers are claimed to have some distinctive properties such as high moisture absorption, better drape and deep colour effect [9, 10]. Bamboo fiber are claimed to have unique properties such as inherent antimicrobial, UV-shielding properties without aid from petrol-derivative chemicals. These unique properties and the sustainable nature of bamboo fiber have started to attract consumers in the textile market, particularly due to the high price [11].
