am ▁" Y oki " ▁Gill ▁and ▁his ▁wife ▁Daniel la ▁developed ▁the ▁design ▁of ▁Source ▁Sand als ▁in ▁the ▁late ▁ 1 9 8 0 s ▁ ▁and ▁established ▁Source ▁V ag ab ond ▁Systems ▁in ▁ 1 9 9 0 . ▁Since ▁then , ▁Source ▁( S hor esh ) ▁sand als ▁have ▁become ▁ ▁popular ▁among ▁Isra eli ▁back pack ers , ▁to ▁the ▁point ▁where ▁trav elling ▁Israel is ▁often ▁recognize ▁fellow ▁Israel is ▁by ▁their ▁foot we ar . ▁ ▁More ▁than ▁ 1 8 0 , 0 0 0 ▁pairs ▁are ▁sold ▁per ▁year , ▁with ▁a ▁growing ▁share ▁also ▁outside ▁of ▁Israel . ▁ ▁Product ▁ ▁The ▁brand ▁can ▁be ▁recognized ▁by ▁the ▁stra ps ▁forming ▁an ▁“ x ” ▁below ▁the ▁an k le . ▁Other ▁typical ▁features ▁include : ▁The ▁sand als ▁are ▁delivered ▁in ▁a ▁fabric ▁bag ▁instead ▁of ▁a ▁card board ▁box ▁( the ▁b ags ▁are ▁often ▁used ▁by ▁the ▁travel ers ▁for ▁to ile try ▁and ▁other ▁purposes ). ▁And ▁they ▁feature ▁a ▁' Green ▁D ot ' ▁lifetime ▁war rant y . ▁Every ▁sand al ▁be ars ▁a ▁tag ▁with ▁a ▁unique ▁id - number , ▁through ▁which ▁the ▁sand al ' s ▁manufact uring - history ▁can ▁be ▁looked ▁up . ▁The ▁sand als ▁are ▁manufact ured ▁in ▁the ▁company ' s ▁factory ▁in ▁T irat ▁Car mel ▁in ▁northern ▁Israel . ▁ ▁In ▁recent ▁years , ▁Source ▁has ▁added ▁a ▁line ▁of ▁so cks ▁and ▁hyd r