Kunyanya kusanganisira simba rekutsemuka uye kupfeka kusagadzikana kwemachira. Simba rekuputsika rinoratidza kusimba kwejira pasi pemasimba akasiyana. Maererano nemasimba akasiyana, kune simba rekutsemuka kwekutsemuka, simba rekubvarura, uye simba rekuputika. Kusamira kwejira kunoreva kugona kwayo kuramba kusakara uye kubvaruka. Kune marudzi akasiyana-siyana ekupfeka, akadai sekugaya, kupeta kumucheto, uye kugaya. Kushongedzwa kwekupfeka kwemicheka kazhinji kunoratidza kukurumidza kwavo. Kunyaradza kuita kunosanganisira kutamisa kupisa, kupisa kwemafuta, mhute yemvura permeability, kufema, chimiro, kusimba uye kuchinjika, kudhirowa, uye pilling yemachira. Iyo yekupisa kupisa midziyo yemachira inoreva kugona kwemachira kuendesa kupisa pachikamu cheyuniti uye panguva yeyuniti. Izvo zvakapesana ndeye thermal insulation (thermal impedance). Zvipfeko zvezhizha zvinoda kutamisa kupisa kwakanaka, nepo zvipfeko zvechando zvinoda kunaka kwekupisa kwekushisa. Kupinda kwemvura kwemachira kunoreva kugona kwemvura ine gasi kupfuura nemumucheka. Fabric breathability inoreva kugona kwejira kupfuura nemhepo. Fabric style inoreva kutaridzika uye tactile zvimiro zvejira. Chitarisiko chinosanganisira ruvara, jira rakapfava, kutsetseka, uye mapatani akaoma. Kubata kunoreva manzwiro etactile, ayo anogona kunge akatsetseka kana kuti akaoma, akatsetseka kana akatsetseka, akaoma kana akapfava, akapfava kana akaomarara, etc. Machira akasiyana ane masitaera akasiyana. Kuomarara kwemucheka uye kuchinjika kunoreva kugona kwejira kumirisana nekukotama kushushikana, kunozivikanwawo se flexural stiffness, iyo inoratidza kupfava kana kuoma kwejira. Fabric drape inoreva kugona kwejira kuti riite seg uye kugadzira nzvimbo yakakombama pasi pehuremu hwayo. Kana jira racho rakapfava, rinoumba nzvimbo yakatsetseka uye yakafanana yakakombama ine yakanaka drape. Pilling nepilling yemucheka inoitika panguva yekushandiswa nekuwacha. Nekuda kwekukweshana kwejira, iyo fiber inopera pamusoro inoburitswa pachena, ichipa kutaridzika kusinganzwisisike, iyo inonzi fuzzing. Kana mvere idzi dzikasadonha nekufamba kwenguva dzokochekerana kuti dziite twunhu tudiki twakaita bead, inonzi pilling. Pilling uye pilling zvinogona kukuvadza kutaridzika kwejira uye kuderedza kupfeka kwayo. Kazhinji, machira akachena kana akasanganiswa akagadzirwa nemafibhi ekugadzira anowanzo piringirwa uye kupora, uye matanho anoenderana anofanirwa kutorwa kuti azvidzivirire. Mucheka unofanirwa kuva nekudzokororwa kwekuita kwesimba mukushandiswa, yakanaka elastic kupora uye anti-kuchembera kana kusapera basa zvakakoshawo zvakanyanya.
