Ducky Rubber keycap - Feel the touch, feel the texture.
Amazon.com: Tai-Hao 22 Key Set TPR Rubber Keycap for Cherry Mx Gaming Keyboards OEM Profile Shine-Through Backlite (Purple) : Video Games
Amazon.com: Foamy Lizard Pro Rubber Keycap Set Backlit Set of Cherry MX Compatible OEM Profile Double Shot Shine-Through Keys with Key Puller (Black - Set of 8) : Electronics
Ducky 31-Key Rubber Backlit Double Shot Keycap Set - Green | eBay