High-concerned chemical: none Craft of Weaving: Knit Model Number: 289-3 Pattern Type: Solid Material: Bamboo fiber,Elastane Brand Name: sylentro Origin: Mainland China CN: Guangdong Gender: Men Briefs & Boxers: BRIEFS Fabric name: bamboo fibre Content of main fabric composition: 95% The material content in the crotch: 5% function: Ventilation packaged form: simple package Waist type: Middle-waisted error range: 1-3cm revision: Can be revised Applicable categories: Male style: briefs Design features: U convex design Applicable gender: male,men,man size: Smaller, Asian size feature: Once you wear bamboo fiber underwear, you never want to wear cotton