Ka boiphihlelo ba lilemo tsa tlhahiso ea fektheri ea li-slings tsa marang-rang , Lishenflex e ka fana ka mefuta e mengata ea marang-rang . li-slings tsa fektheri ea fektheri ea e ka kopanang le likopo tse ngata, haeba u li hloka, ka kopo fumana tšebeletso ea rona e nakong mabapi le fektheri ea marang-rang ea marang-rang . Ho phaella lethathamong la lihlahisoa tse ka tlase, u ka boela ua iketsetsa fektheri ea hau e ikhethang ea li-slings ho latela litlhoko tsa hau tse khethehileng.