Single weight: 240-280g

Collar material: tough outer skin, thickened foam cotton inside.
Rivet material: Hardware
Size: 

XS: 5 * 51cm,can be adjusted 37-42cm

S: 5*56cm,can be adjusted  42-50cm

M: 5*61cm,can be adjusted  47-55cm

L: 5*66cm,can be adjusted  52-60cm