The Castelli Thermoflex pirate leg warmers are very elastic, the thermoflex fabric allows them to be very easy to put on and take off. This Castelli model provides a lot of comfort since it adjusts perfectly to the shape of the leg. Castelli Thermoflex pirate knee pads focus on hitting the nail with all its features:- The fabric is more warm and elastic, the fit is tight and eliminates excess material.- Silicone top headband prevents the heater from dropping.- Half-lap closure cuff adds a touch of extra comfort.COMPOSITION- 85% Polyamide.- 15% Elastane.Reference code: 4517044010