Attacus atlas cocoons used in this research had an aver- age weight of 1.21 g, much higher than that of B. mori (640 milligrams) and P. ricin (840 mg) cocoons but lower than that of the A. mylitta (3.4 g) cocoons [12, 13]. The A. atlas cocoons are constructed in three distinct layers. The outer layer was loosely attached and was paper-like as seen from Figure 1a and had a thickness of 0.5 ± 0.2 mm and accounted for approximately 23 % of the total weight of the cocoon. In comparison, middle or interme- diate layer (Figure 1b) with a thickness of 0.6 ± 0.2 mm formed the bulk of the cocoons and accounted for 43 % of the weight of the cocoon. The intermediate layer con- tains most of the fibers and was loosely connected to the outer layer but very tightly connected to the inner layer. Innermost layer seen in Figure 1c accounted for approximately 34 % of the weight of the cocoon and had an average thickness of 0.20 ± 0.09 mm. As seen from Figure 1c, the size of the layers decreased progressively from the outer layer to the inner layer. It is reported that the caterpillar decreases its size as it builds the cocoons from outside to inside making the cocoons compact with the inner most layer being the smallest.