Feature:_x000D_Faster synaptic response (brain function), enhanced muscle response (in both fast and slow twitch tissues)._x000D_Increased stamina (better oxygen uptake and recovery), more flexibility (faster recovery) and vastly improved gravitational balance. _x000D_The 3mm thick wristband is made from 100% Surgical Grade Silicone that is extremely durable, featuring a 40% stretch feature for extra stretch over the hands._x000D_Material: Silicon_x000D_Size: Length 20.5cm_x000D_Colors: As pic_x000D_Gender: Women / Men_x000D_Type: Boost Energy Hologram Bracelets._x000D_Style: Sports_x000D_Occasion: Anniversary, Engagement, Gift, Party_x000D_Package Includes:1pcs _x000D_Note: _x000D_1.Please allow 0.1-0.3cm differences due to manual measurement, thanks._x000D_2.Please understand because of the light irradiation or computer display difference, so I can't guarantee photos and real color is 100% the same._x000D_