If you seek the glory and blessings of the gods, then follow these 6 easy steps:

• Step 1: Get chosen by an ivi-attuas in a dream
• Step 2: Prepare your pora and swim to the islet of Motu Nui
• Step 3: Await the sooty terns and collect the first egg of the season
• Step 4: Call out to the shore that you have the egg [your benefactor shaves his head and paints it white or red]
• Step 5: Swim back to shore with the egg secured inside a reed basket tied to your forehead
• Step 6: Scale the cliff face of Rano Kau, present the egg to your benefactor, become the birdman, and claim your sacred rights.

waltuh

Yes! Birdman caps have the same grip texture as the "gripster" gamer sets I make as well: https://www.resin-party.com/product-page/gripsters-asphalt

The caps are entirely resin, so the tactile feel is more pleasant than sandpaper, but you can still find them by feel.