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Bilt HEAT-OUT Helmet Liner

HEAT OUT base-layer garments utilize cutting-edge textile technology for effective temperature regulation and perspiration management -with outstanding stretch & recovery- to provide maximum comfort in warm weather conditions. A precise blend of 60% nylon, 35% polyester and 5% spandex fibers ensures dynamic fit and comfort with essential properties to enhance riding comfort. The moisture wicking properties draw perspiration away from the skin and assist in rapid evaporation into the surrounding air, thus keeping you cooler during periods of exertion or when external temperatures are high. Extraordinary stretch and recovery is achieved with multi-directional spandex fibers throughout for an optimal balance of close-fit and complete freedom-of-movement. An ANTI-MICROBIAL treatment helps to eliminate odor-producing bacteria generated during perspiration, keeping you refreshed during periods of activity and rest. Revolutionary HEAT OUT base-layer garments will enhance your riding experience. Get in to HEAT OUT!


  • Hi-Tech Fabric blend wicks perspiration
  • Full stretch and recovery for dynamic freedom-of-movement
  • Anti-microbial treatment reduces odor
  • Flat Seam construction layers comfortably

To extend the life of your Heat-Out Base Layers, machine wash cold and hang to dry. Dry cleaning, use of bleach, and tumble drying are not recommended.

4.3 / 5.0
243 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Bang for the Buck
4.0 / 5
Would Purchase Again
3.6 / 5
3.7 / 5
3.7 / 5
3.9 / 5
3.3 / 5
Would you recommend?
Yes (8)
No (1)
I was skepticle but liner is excelent
product is great in hot weather

PROS: Lightweight, Breathable, Comfortable

BEST USES: Off-Road, Street Riding, Long Rides
June 30, 2012
great for the hot days or daily routines
Great for keeping the sweat out of your eyes and cooling your head

PROS: Comfortable, Abrasion Resistant, Breathable, Stylish, Tough, Lightweight

BEST USES: Poor Weather, Long Rides, Street Riding, Off-Road, Protection, Racing
August 5, 2014
Works great
This is the best headgear I have found. I use it under my offroad helmet, and it absorbs the sweat, keeping your helmet liner clean and dry. Throw it in the wash and good to go. I also use it out on the mountain bicycle, even in the winter. It keeps the cold air off your head and ears, especially during night rides, yet still absorbs the sweat to help keep your head dry. Doesn't due much for helmet head though, unless you leave it on when the helmet comes off! Great product!

PROS: Breathable

February 13, 2013
Perfect cooling liner & helmet protector
great to keep your helmet from getting stinky between washings

PROS: Helmet Preservation, Lightweight, Breathable, Comfortable

CONS: None

BEST USES: Racing, Long Rides, Protects Helmet, Off-Road
July 7, 2014
Good head
Make your helmet padding last longer by absorbing sweat and skin oil.
Keeps head cooler in summer and warmer in winter.

PROS: Abrasion Resistant, Breathable, Lightweight, Comfortable

BEST USES: Poor Weather, Street Riding, Racing, Long Rides, Protection, Off-Road
November 2, 2015
Do you have helmet hair?
These really help keep your head cooler on hot summer rides, and help prevent helmet head/hair!

PROS: Lightweight, Comfortable, Breathable

BEST USES: Long Rides, Street Riding, Racing, Off-Road
November 2, 2015
Keeps the Heat out
Cool liner. Keeps my head cool when riding. Temperatures in mid to upper 90s and kept my head cool. I actually use it under a baseball catcher's helmet too when it is 90 and high humidity. Works awesome. I've been looking for one of these

PROS: Lightweight, Breathable, Comfortable

BEST USES: Long Rides, Poor Weather, Street Riding
August 3, 2014
Absolutly love it! Should have got two
Keeps my helmet liner dry.

PROS: Comfortable, Breathable

November 13, 2015
Great product to keep head dry
I put it on before my helmet all the time.

PROS: Lightweight, Keep Helmet Dry

CONS: None

BEST USES: Street Riding, Long Rides, Protection
August 1, 2014
"I would buy this product again and again
Holds the phone very good. excellent for riding with gps.

PROS: Tough

CONS: Easy To Steal

BEST USES: Long Rides, Street Riding
November 2, 2015
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Product Style Item # Manufacturer Product # Availability
Black 1133340 734321 In Stock: Ships within 24 hours