Castelli Thermoflex 2 Knee Warmer When you don't need the extra wet weather protection of Nano Flex, or you're happy with traditional warmers, you'll find that the Castelli Thermoflex 2 Knee Warmers offer the softest, most luxurious fabric combined with careful attention to construction details. They're constructed using Thermoflex Fleece fabric, which is warm, stretchy and soft making them comfortable to wear for as long as you plan to ride in cold riding conditions. The dual-sided silicone gripper elastic at top prevents them from sliding down, so no need to ever have to reposition mid-ride. FEATURESThermoflex fleece fabric is warm, stretchy and soft Single-piece construction with flat-lock seams Embossed Castelli wordmark logos for style Dual-sided silicone gripper elastic at top prevents sliding down Sizing Size Small Medium Large Extra Large XX Large XXX Large Chest35 1/2-3737-38 1/239-4141-4343-4545-47Waist29 1/2-31 1/231-3333-35 1/235 1/2-37 1/238 1/2-40 1/241-43Hips36 1/2-38 1/238-4040-4242-4444-4646-48Inseam31 1/23232 1/432 3/43334 3/4 | Castelli | Thermoflex 2 Knee Warmer Men's | Size Extra Large In Black