1. Iki gicuruzwa kirimo umurongo winkunga wakozwe mubyuma byoroshye, bishobora gutanga inkunga kumyungu no kugabanya umutwaro mukibuno.
2. umwenda urahumeka kandi ntiwumva ibintu byuzuye iyo wambaye igihe kirekire.
3. ibikoresho byose bibisi bihuye numutekano nubuzima, ntabwo birimo florescente nibindi bintu byangiza.
4. urugwiro rwiza rwuruhu, kwinjiza amazi neza, kwambara neza, birashobora kwambarwa kumubiri.
5. igishushanyo mbonera cyubusa ni cyiza kandi kirashobora kwerekana igitsina.
6. guhindagurika kwa elastique kugirango uhuze nibikenewe mubihe bitandukanye nyuma yo kubyara.
7. igishushanyo mbonera cya ergonomic, gukomera munda icyarimwe ntibizaba bikomye umubiri cyane, nta gukomera no guhumeka.