A sleever has two slats connected together by a spring in the form of a pair of elongated outwardly bowed leaf springs such that the slats are parallel. A handle has a pair of members pivoted to the slats to apply an inward force for compressing the spring and moving the slats together for insertion into, or removal from, the sleeve of a garment. The slats and handle members are connected to the midsections of the outwardly bowed springs, enabling the slats to remain parallel when together, apart and/or in intermediate positions, thereby being adaptable to shape garment sleeves of various sizes during a garment conditioning or finishing operation.