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Model 306 takes a more restrained approach than Bonetto’s traditional dive designs. It features a smooth, streamlined profile with gently beveled edges and minimal surface detailing, giving it a cleaner, more contemporary look on the wrist. The evenly spaced adjustment holes keep the appearance simple and balanced rather than overtly sporty.
This is one of the most understated rubber straps in the Bonetto range. It works especially well on modern tool watches and everyday sports watches where you want the durability of rubber without heavy dive-strap styling or visual bulk.
Made in Italy from vulcanized NBR rubber. Waterproof, UV-resistant, and nonallergenic.
This strap is made from vulcanized nitrile butadiene rubber (NBR), selected for its durability, flexibility, and resistance to seawater and sunlight. The vulcanization process strengthens the material while maintaining controlled flexibility, allowing the strap to bend naturally without feeling soft or unstable.
Compared to Bonetto’s wave and ladder styles, Model 306 feels smoother and more uniform on the wrist. The beveled edges reduce visual and physical bulk, giving the strap a comfortable, low-profile feel that sits cleanly against the wrist. The matte surface resists lint and dust more effectively than many silicone straps and maintains a tidy, modern appearance.
Carries a light vanilla scent, typical of Italian-made vulcanized rubber.
Thickness: approx. 4.8mm→3.5mm (measured at lug end, tapering toward buckle)
Sheen: Matte
Buckle: Polished stainless steel
Taper by size:
Spring bars: Standard (free pair included)
Model 306 is designed for watches that benefit from a clean, streamlined strap profile. The smooth surface and beveled edges help the strap wear flatter and lighter than more heavily sculpted dive straps, making it well suited to everyday use.
This model accommodates spring bars up to 1.5mm in diameter.
For a deeper look at how rubber straps behave on the wrist, see our guide to rubber strap fit and comfort.
Length & wrist size:
125mm / 75mm (fits wrists approx. 7.0–7.75in)
Measurements exclude the buckle.
Water exposure: Waterproof, designed for prolonged water exposure including swimming and diving.
For routine care, rinse with lukewarm water and mild soap as needed. Rinse thoroughly to remove residue. Avoid solvents, petroleum-based cleaners, and abrasive materials, as these can damage the rubber. Dry with a soft cloth and allow the strap to air dry completely before wearing.
Bonetto Cinturini is an Italian manufacturer with more than forty years of experience producing rubber watch straps for professional and everyday use. The brand specializes in straps made from vulcanized nitrile butadiene rubber, selected for its durability, flexibility, and resistance to seawater and UV exposure.
Bonetto Cinturini straps are widely used by watch manufacturers and enthusiasts who value long-term performance, comfort, and straightforward, functional design.
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