The ATH DFS Helmet is unmistakably IRH. This popular helmet is covered in rich, durable velveteen, and features a Carbon Fiber front vent strip and rear vents to keep you cool.

A three-point adjustable retention system and our Dial Fit System technology assure a proper fit with just a turn of the dial.

ASTM F-1163-04a/SEI Certified

To achieve the correct Helmet Size:
- Place tape measure around head just above eyebrow ridges
- Convert the resulting measurement in inches to the size listed in the chart below:

Size	6 1/2"	6 5/8"	6 3/4"	6 7/8"	7"	7 1/8"	7 1/4"	7 3/8"	7 1/2"
Measurement	20"	20.5"	21"	21.5"	22"	22.5"	23"	23.5"	24"

Sizes:
Small (6 3/8 - 6 1/2)
Medium (6 5/8 - 6 3/4)
Large (6 7/8 - 7 1/8)
Extra Large (7 1/4 - 7 1/2)