section 41 as shown in fig2 and extends outwardly therefrom to an opposed outer end 44 b illustrated in fig1 and 2 in this particular example inner end 44 a of strap 44 is applied to inner face 22 of covering 21 at hip section 41 and is secured to covering 21 with sewing indicated by stitching 70 in fig2 although adhesive heat bonding or other fastening technique may be used to secure inner end 44 a of strap 44 in place to covering 21 an engagement assembly is formed between covering 21 and outer end 44 b of strap 44 which is operable to configure strap 44 between an open position with respect to hip section 41 of covering 21 as shown in fig1 and 2 extending outwardly from hip section 41 of covering 21 and a closed position with respect to hip section 41 of covering 21 as shown in fig3 and 4 forming an attachment or engagement loop denoted at 71 at hip section 41 of covering 21 the engagement assembly formed between covering 21 and outer end 44 a of strap is as shown in fig1 a hook and loop fastener such as the type founder under the trademark velcro including an element 74 thereof formed in covering 21 at hip section 41 and a complementing element 75 thereof formed in outer end 44 b of strap 41 in this example element 74 is applied to outer face 23 of covering 21 at hip section 41 to form loop 71 denoted in fig3 outer end 74.