It is my understanding that loose toe straps don't do much to improve pedaling efficiency. They are supposed to be tightened and worn with stiff soled cycling shoes. If you want to get in and off the pedals easily, clipless pedals are more effective and will improve pedaling efficiency. If you want to wear whatever shoes you want, lose the toe clips and straps-- I use real rubber block pedals and wear whatever shoes I want, even my nice soft leather shoes/boots.