Feature: Faster synaptic response (brain function), enhanced muscle response (in both fast and slow twitch tissues). Increased stamina (better oxygen uptake and recovery), more flexibility (faster recovery) and vastly improved gravitational balance. 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. Material: Silicon Size: Length 20.5cm Colors: As pic Gender: Women / Men Type: Boost Energy Hologram Bracelets. Style: Sports Occasion: Anniversary, Engagement, Gift, Party Package Includes:1pcs Note: 1.Please allow 0.1-0.3cm differences due to manual measurement, thanks. 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. The merchant warrants that their products comply with all applicable laws, and are offered only if they comply with Joom's policies and EU Product Safety and Compliance laws.