The following is quoted from the Montbell website: These tights feature wind-resistant and highly insulating Climabarrier® on the front, and mid-thickness stretch Climaplus® on the back, which has excellent moisture absorption and diffusion properties. They effectively block the wind while quickly releasing sweat, making them ideal for cycling in the chilly seasons of spring and autumn. They also have outstanding stretch, supporting comfortable pedaling even during intense riding. Specifications: 【Material】 (Front) Climabarrier® [Polyester (Water repellent finish) / Lining: Polyester] (Back) Stretch Climaplus® 100 [85% Polyester + 15% Polyurethane (Brushed back)] 【Average Weight】248g 【Color】Black (BK) 【Size】M 【Features】Reflective logo on the front left thigh and right calf / Flat seams to eliminate bulkiness / Includes inner pad (3D stretch pad) / 1 coin pocket (inside right waist) / No front opening I don't remember when I purchased them, but I've worn them about twice, for a total of about 8 hours of riding, so the usage period is short. Thank you.