Nke a bụ bra egwuregwu siri ike nke na-egosi ọmarịcha nwanyị.Ojiji nke akwa egwuregwu dị elu, nhazi grid na-eku ume, iji nweta nsonaazụ mara mma ma dị mma.Enweghị mgbanaka ígwè na-ejikọta, na-eme ka mgbasa ọbara na-ekesa, belata mmegharị nke ịkwagharị, nlekọta dị mma nke obi.Site obosara nsọtụ nke straps imewe, ị nwere ike evenly kesaa nrụgide n'ubu, ọzọ kwụsiri ike obi, iji zere onu nke mbupụ.Back site pụrụ iche kpara oghere imewe, nwere ike ngwa ngwa sweat.With elu support, elu elasticity na akpụkpọ-enyi na enyi, ezi resilience, na-akọrọ ije.Ịkwụtị aka n'efu na-enweghị njigide, nnukwu ngbanwe ka ọ na-agagharị n'enweghị ihe ọ bụla, imewe oghere na-eme ka ọsụsọ na-eku ume.