Features: Made of quality silicone material, breathable, durable and elastic, comfortable and lightweight, making your sports life more ease. With a porous design, one size fits most people, adjustable length meets diffenent needs. Waterproof and sweatproof, moderately soft and comfortable to wear. Stylish and elegant appearance, highlight your personality, fashionable and novel. for Forerunner55/158/245/245music/645/645music/Venu/Venu SQ/Venu 2 plus/approach S40 etc 20mm strap width for smart watches. Specifications: Main Material: Silicone Color: Army Green Black, Red Black, Yellow Black, Light Blue, Black for Grey, White Black, Sand Powder White, Black Red, Lime Black, Navy Blue White(optional) Width: 20mm/0.78" Strap Length: Approx. 121.1+92.8 mm/4.76+3.65 inch Packing Method: pearl film bag Applicable Models: for vivomove sport for approach S40 for Venu/Venu SQ/Venu 2 plus for vivomove3/vivoMove Luxe/vivoMove style/vivomove/vivomove for HR sport for vivoactive3/vivoactive3 music for Forerunner55/158/245/245music/645/645music Note: Watch strap only, for smart watch is not included. Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you mind. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Piece Silicone Watch Strap