This is the C4 Silicon Marseille Weight Stainless Freediving Spearfishing Belt All Color Options Features: MATERIAL: Silicone DIMENSIONS: Length: 1.45 m Height: 50 mm Thickness: 5.0 mm MAXIMUM EXTENSION: 570% TEMPERATURE OF USE: -70°C to +200°C Silicone rubber belt featuring a quick release Marseillaise style stainless steel buckle. This belt is highly superior to all other traditional natural rubber made diving belts. The silicone used is extremely elastic and very resistant to salt water and sunlight.