The NEW improved bt Men's Bamboo Brief. Now with upgraded thicker material body, and upgraded waistband for even longer lasting top quality softness and comfort. There's no excuse for owning bad underwear; with the wrong pair of briefs or trunks, your whole day can be ruined, but with these comfy briefs every day will be a good day - well, in the underwear department anyway! With the same excellent qualities as the trunks, they will move easily with you wherever you go; whether for work or play, these will keep you extremely comfortable, cool and super fresh. - Made from 75% Bamboo, 20% Cotton and 5% Elastane (for a real snug fit!), they're both breathable and flexible. You'll almost forget you're wearing underwear. - Ready to add briefs to your routine? - Flexible & breathable - Size Guide for Bamboo Textiles Waist Size Inches - CMS28 3070-76 cm - M30 3276-82 cm - L32 3482-86 cm - XL34 3686-92 cm2XL36 3892-97 cm3XL38 40 97-102 cm4XL40+102 cm+Fabric Composition and Care75% Bamboo, 20% Cotton and 5% Elastane. To keep these as good as can be, wash them on a cool and gentle cycle, and dry them on the line.