T-strap
[ tee-strap ]
/ ˈtiˌstræp /
noun
a strap on the upper of a shoe that extends backward from the vamp and joins with a strap that crosses the upper part of the instep, forming a T.
a shoe having such a strap.
British Dictionary definitions for t-strap
T-strap
noun
(modifier)
denoting a type of woman's shoe fastened with a T-shaped strap having one part passing across the ankle and the other attached to it in the middle and lying along the length of the foot
Also called: T-bar