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Alpinestars Bionic SX Knee Protector
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Information and Details about the Alpinestars Bionic SX Knee Protector
made by Alpinestars
Alpinestars Bionic SX Knee Protector provides impact and motion injury to the knee and surrounding tissue. With coverage for the knee, shin and thigh, the Alpinestars Bionic SX Knee Protector is slim fitting and simple to adjust. Breathable and comfortable, the Alpinestars Bionic SX Knee Protector is a knee brace you can wear for every activity.

  • Super lightweight knee guard that provides exceptional impact protection
  • Extensive protection zones fulfills CE standard EN 1621-1 (KL Type B)
  • Constructed with highly breathable materials in an efficient ventilation configuration for superior airflow
  • Complete TPU protector coverage over the knee, shin and lower thigh
  • Inner medial kneecup features a sleek design for reduced material thickness between the knee and bike for greater control while riding
  • Guard is backed with highly perforated, PU memory foam to keep you cool and comfortable. Slim, easy to adjust straps ensure a precise fit

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    Sizing Chart & Specs for the Alpinestars Bionic SX Knee Protector
    ALPINESTARS
    Alpinestars Boots
    US SizeEuro Size
    335
    3.536
    437
    538
    639
    6.540
    7.541
    842
    943
    9.544
    10.545
    11.546
    1247
    12.548
    1349
    13.550
    Alpinestars Womens Boots
    US SizeEuro Size
    5.536
    637
    738
    839
    8.540
    9.541
    1042
    1143




    PANTS AND JACKETS
    Bust or Chest: measured around the fullest part of the chest
    Waist: measured at the natural waist
    Hip: measured at the widest part of the hips
    Inseam: measured from the crotch to the floor
    Height: natural height without shoes

    WOMENS
    Alpinestars Womens Pants Sizes
    SizeWaistHipInseamHeight
    XS23.5" - 26.7"34.2" - 35.8"30"63"
    SM26.7" - 28.7"36.6" - 38.2"31"64"
    MD28.7" - 31.1"39" - 40.5"31"65"
    LG31.1" - 33.5"41.2" - 43"32"66"
    XL33.5" - 35.8"43.7" - 45.2"33"67"
    2X35.8" - 38.2"46" - 47.7"33"68"
    Alpinestars Womens Textile Jacket Sizes
    SizeBustWaistHipHeight
    XS32.6" - 34.2"24.8" - 26.3"34.2" - 35.8"64 - 65"
    SM35" - 36.6"27.1" - 28.7"36.6" - 38.2"65 - 67"
    MD37.4" - 38.9"29.5" - 31.1"38.9" - 40.5"67 - 68"
    LG39.7" - 41.3"31.9" - 33.4"41.3" - 42.9"68 - 69"
    XL42" - 43.7"34.2" - 35.8"43.7" - 45.2"69 - 70"
    2X44.5" - 46"36.6" - 38.2"46" - 47.7"70 - 71"
    Alpinestars Womens Leather Jacket Sizes
    Euro SizeBustWaistHipHeight
    3432.6" - 34.2"24.8" - 26.3"34.2" - 35.8"63"
    3635" - 36.6"27.1" - 28.7"36.6" - 38.2"64"
    3837.4" - 38.9"29.5" - 31.1"38.9" - 40.5"65"
    4039.7" - 41.3"31.9" - 33.4"41.3" - 42.9"67"
    4242" - 43.7"34.2" - 35.8"43.7" - 45.2"68"
    4444.5" - 46"36.6" - 38.2"46" - 47.7"69"
    4644.5" - 46"36.6" - 38.2"46" - 47.7"70"


    MENS
    Alpinestars Mens Pants Sizes
    SizeUS SizeEuro SizeWaistHipInseamHeight
    XS284429.8"36.2"30"69"
    SM304631.5"37.7"32"70"
    MD324833.1"39.8"34"71"
    LG345034.6"41"34"72"
    XL365236.2"42.5"36"73"
    2X385437.7"44.1"36"75"
    3X405639.4"45.6"38"76"
    4X425841"47.2"38"77"
    Alpinestars Mens Textile Jacket Sizes
    SizeChestWaistHipHeight
    XS35" - 36.6"28.7" - 30.2"35" - 36.6"67 - 69"
    SM37.4" - 38.9"31.1" - 32.6"37.4" - 38.9"69 - 70"
    MD39.7" - 41.3"33.4" - 35"39.7" - 41.3"70 - 71"
    LG42.1" - 43.7"35.8" - 37.4"42.1" - 43.7"71 - 72"
    XL44.5" - 46"38.1" - 39.7"44.5" - 46"72 - 73"
    2X46.8" - 48.7"40.5" - 42.1"46.8" - 48.4"73 - 75"
    3X49.2" - 50.7"42.8" - 44.5"49.2" - 50.7"75 - 76"
    4X51.6" - 53.1"45.2" - 46.8"51.8" - 53.1"76 - 77"
    Alpinestars Mens Leather Jacket Sizes
    Euro SizeChestWaistHipHeight
    4636.6"29.8"36.6"69"
    4837.4"31.5"37.4"70"
    5039.3"33.1"39.8"71"
    5241"34.6"41"72"
    5442.5"36.2"42.5"73"
    5644.1"37.7"44.1"75"
    5845.6"39.4"45.6"76"
    6047.2"41"47.2"77"


    RACING SUITS
    Alpinestars Mens Suits Sizes
    SizeWaistHipInseamHeight
    3629.8"36.2"30"69"
    3831.5"37.7"32"70"
    4033.1"39.8"34"71"
    4234.6"41"34"72"
    4436.2"42.5"36"73"
    4637.7"44.1"36"75"
    4839.4"45.6"38"76"
    5041"47.2"38"77"

    Alpinestars Womens Suits Sizes
    SizeBustWaistHipInseamHeight
    3431.5"23.5"33"30.2"63"
    3633"25.2"34.7"31"64"
    3834.7"26.7"36.2"31"65"
    4036.2"28.2"37.7"32"67"
    4237.7"30"39.2"32"68"
    4439.2"31.5"41"32.7"69"
    4641"33.2"42.5"33.5"70"




    Alpinestars Gloves Sizing
    To measure for Gloves: place a tape measure under your palm and measure from the knuckle of your forefinger to the knuckle of your pinkie finger. Note the measurement and compare it to the chart below.

    Alpinestars Glove Sizes
    MeasurementGlove SizeNumeric Size
    2 1/8" - 2 5/8"XS7
    2 5/8" - 3 1/8"SM8
    3 1/8" - 3 5/8"MD9
    3 5/8" - 4 1/8"LG10
    4 1/8" - 4 5/8"XL11
    4 5/8" - 5 1/8"2X12




    We do not guarantee fit. This sizing chart is a suggested guideline only.
    Part Number Status for Alpinestars Bionic SX Knee Protector
    Options SKU Our Price Availability
    X-Small Small AS-BSXK-XS/S $139.95 Currently Not Available for Order
    Medium Large AS-BSXK-M/L $139.95 Usually Ships in 1-3 Business Days


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