It means having a secure fit around the ankle, which adds stability on uneven terrain, boots deals.

Department Name: Adult
Item Type: Boots
Heel Height: Low (1cm-3cm)
Pattern Type: Striped
Outsole Material: Rubber
Insole Material: PVC
Upper Material: Microfiber
Boot Type: Work & Safety
Shaft Material: Cotton Fabric
Lining Material: Mesh
is_handmade: Yes
Closure Type: Lace-Up
Fashion Element: Cross-tied
Toe Shape: Round Toe
Brand Name: MODYF
Season: Spring/Autumn
Fit: Fits true to size, take your normal size
Boot Height: Ankle
Model Number: M150105

The materials are chosen for their ability to stretch and contract within a controlled range, accommodating natural foot swelling, composite toe work boots.