A wearable device (100, 150) having: a body (102, 152); a band strap (110, 160) connected to the body (102, 152) and having a free end; a magnetic tab (614, 714) attached to the free end of the band strap (110, 160), the magnetic tab (614, 714) including a magnetic element; and a loop (124, 174) defining an aperture (124a, 174a) receiving the free end of the band strap (110, 160), wherein the magnetic tab (614, 714) is configured to pass through the aperture (124a, 174a) and attach to a surface of the band strap (110, 160) using the magnetic element, and wherein the loop (124, 174) is attached to the body (102, 152) and the band strap (110, 160) is configured to attach the wearable device (100, 150) to a wrist of a user; characterised in that: the band strap is formed from a metallic mesh material; the magnetic tab (614, 714) includes an attachment face having a substantially flat surface that is configured to mate to the surface of the band strap (110, 160) when the wearable device (100, 150) is attached, and by a friction-enhancing member (616, 816) disposed on the attachment face and configured to increase a resistance to shear when the magnetic tab (614, 714) is attached to the surface of the band strap (110, 160), wherein the friction-enhancing member comprises a ring disposed in a groove formed in the attachment face of the magnetic tab (614, 714). a body (102, 152); a band strap (110, 160) connected to the body (102, 152) and having a free end; a magnetic tab (614, 714) attached to the free end of the band strap (110, 160), the magnetic tab (614, 714) including a magnetic element; and a loop (124, 174) defining an aperture (124a, 174a) receiving the free end of the band strap (110, 160), wherein the magnetic tab (614, 714) is configured to pass through the aperture (124a, 174a) and attach to a surface of the band strap (110, 160) using the magnetic element, and wherein the loop (124, 174) is attached to the body (102, 152) and the band strap (110, 160) is configured to attach the wearable device (100, 150) to a wrist of a user; characterised in that: the band strap is formed from a metallic mesh material; the magnetic tab (614, 714) includes an attachment face having a substantially flat surface that is configured to mate to the surface of the band strap (110, 160) when the wearable device (100, 150) is attached, and by a friction-enhancing member (616, 816) disposed on the attachment face and configured to increase a resistance to shear when the magnetic tab (614, 714) is attached to the surface of the band strap (110, 160), wherein the friction-enhancing member comprises a ring disposed in a groove formed in the attachment face of the magnetic tab (614, 714). the band strap is formed from a metallic mesh material; the magnetic tab (614, 714) includes an attachment face having a substantially flat surface that is configured to mate to the surface of the band strap (110, 160) when the wearable device (100, 150) is attached, and by a friction-enhancing member (616, 816) disposed on the attachment face and configured to increase a resistance to shear when the magnetic tab (614, 714) is attached to the surface of the band strap (110, 160), wherein the friction-enhancing member comprises a ring disposed in a groove formed in the attachment face of the magnetic tab (614, 714).