Degloving injury occurs at:-
Degloving injury - it is the separation of skin and subcutaneous tissues from the underlying bone, muscle or vasculature. Degloving occurs when the skin and subcutaneous fat are stripped by avulsion from the underlying fascia, leaving neuro vascular structures, tendon or bone exposed.
Skin
Skin + Subcutaneous tissue
Skin + Fascia + Subcutaneous tissue
Everything above from bone
NEET 2019