ROCKBROS Knee Warmer for Cycling and Other Sport Activities ROCKBROS cycling knee warmers for many other indoor and outdoor sports recreations, keep you stay active all the time ROCKBROS Knee Warmer Product Parameter Material: 92% Polyester +8% Spandex Weight: 0.16 kg /0.35 lb Package Dimension: 23*13*5 cm /9*5.1*1.96 in Color: Black Green/Blue Black Product Features The knee warmer adopts polyester and spandex to make sure that it's warm and durable enough. These two materials also make the knee warmer elastic and breathable, so it can fit more sizes of thighs. Product Features WINDPROOF WIDER AREA ANTI-SLIP STRAP WARM&DURABLE ERGONOMIC DESIGN UNIVERSAL FITS BREATHABLE Read more Wider Area Anti-slip Strap The knee warmers have a wider area of anti-slip trap than other knee warmers, this makes it can stay on your knee more long time while you are cycling or doing other sport activities. And the elastic material makes it more fit your thigh, under the cooperation of these two features, the knee warmer can keep stable whatever sports you are doing. Read more Warmth & Breathable Material The polyester and spandex can keep the warm air stay inside the knee warmer to keep your knees warm. Elastic Closing Design The elastic material adopted on the knee warmer makes it more fit your leg, so the cold air could hardly get into the knee warmer. Ployester & Spandex Materials The polyester and spandex are more elastic and durable than other materials, which makes the knee warmers universal fit and more durable. Read more