Castelli Pro Seamless Knee Warmer Castelli worked with pro cycling team, Ineos Grenadiers to develop lightweight warmers that provide exceptional warmth and moisture management. The Castelli Pro Seamless Knee Warmer is constructed using a unique polyester/nylon/lycra construction, making them comfortable to wear as long as you need and are stretchy enough to provide a good fit for most. These leg armers are the ideal choice for early morning rides in cool to mildly warm weather and are super compact so you can take them off and fold them up and stash in your rear jersey pocket whenever they're not needed. Features Temperature range10deg-20 degC / 50deg-98degFWeight 74g Mid-weight seamless arm warmer for comfort Materials unique polyester/nylon/Lycra(R) 78%/15%7% blend Packable folds up extra small, perfect for a jersey pocket 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 | Pro Seamless Knee Warmer Men's | Size Large/extra Large In Black | Nylon