Designed and engineered by Formex, this high-tech folding clasp is made of injected micro fiber carbon composite, an ultra light but durable material that feels smooth on the skin. You can fine-adjust the length of the strap by 7mm, gradually on 6 micro steps, without having to take off your watch. This patented feature notably provides more comfort and allows the perfect fit in all conditions.

The folding clasp features a stainless steel buckle and fits straps with a width of 20mm on the buckle. It is designed for Formex Essence leather & rubber straps marked "butterfly". The clasp can be inter-changed without the use of any tools and in a matter of a few seconds.